Is Time Travel Legal? Currently, there is no publicly available technology which would permit one to time travel. However, assuming one were to create such technology, is there any laws prohibiting time travel? I am interested in the various jurisdictions within the United States, but answers based on other jurisdictions would be interesting to read as well.
In theory, this should be protected by the UN Dec. of Human Rights: Article 13 1. Everyone has the right to freedom of movement and residence within the borders of each State. 2. Everyone has the right to leave any country, including his own, and to return to his country. Since it does not specify the type of movement, or restrict its dimensions, this could be construed to include freedom of movement through time as well as space. Other than that things like this there is no real law regarding this.
Google maps (Street View, Google Earth) are all legal, although perhaps they are illegal in North Korea (along with many other things). Permission would be required for them to enter your house and take pictures, but if it can be seen publically, it is legal unless there is a specific law forbidding taking pictures. It is possible that there are legal restrictions on the Street View method of driving around with a camera in some countries, but Earth view shots are obtained by satellite, which is out of the jurisdiction of the objecting country. The Street View gap for Belarus may be due to a legal restriction, or it could just be Google-strategic (there seems to be no public explanation). There have been numerous "legal encounters" involving Street View and the authorities, in the realm of privacy concerns: there is no general rule. Google has the right to make and distribute these photos because there is no (enforceable) law against doing so, unless there is.
Is it illegal to ask a company for money in exchange for information on a bug in their software/website? That in itself is legal. Indeed, the company would incur unjust enrichment if it coerced you to disclose your discovery for free. Only if you threatened the company to divulge to others your discovery unless the company pays you, it would be illegal and trigger charges such as extortion (likewise, legislations outlaw the unjustified delivery of programs or instructions for hacking a software/network/etc., although this goes beyond your actual question). Can the company take legal action against me? That seems doubtful, futile, and it could backfire (please note I have not done any research on legal precedents about this). Although the terms and conditions of the website or the End User License Agreement (EULA) of software might prohibit you to reverse engineer (RE)/decompile/etc. the application, anti-RE clauses are unenforceable and the remedies therefor are indeterminate because the sole act of conducting reverse engineering does not subject the company (or third parties) to any losses. The company's decision to take legal action for your discovery could backfire from two standpoints. First, it calls attention to the fact that the software at issue is defective and unsafe. And second, the bug is likely to be detected by someone else anyway, thereby potentially compromising customers' systems.
Owners of property establish rules of trespass. This applies when the government owns the land just as it does for private property owners. Being a citizen of a country does not give you ownership rights on government land. The government is question can apply multiple rules to multiple pieces of property such as: Park use only during certain hours of the day No unauthorized access Access only for certain uses, such as no camping allowed Certainly no one thinks that military bases, prisons, etc. should have unrestricted access by the public. In general, if you're not allowed to be there the government will put up barriers, gates, lock doors, etc., or place signage to indicate limits. Really not all that different from private property.
Would any offence be committed for: Having this on your person? Buying or selling this? Leaving it around for people to plug in to a computer? In the abstract, I don't think that this conduct would violate either Section 36 of the U.K. law or U.S. law, although, obviously, purposefully destroying a computer itself (i.e. actually using the device without the consent of the owner of the computer) would violate many U.K. laws and would also violate many U.S. laws at both the state and federal level. I also don't think that possession or buying or selling this product would be a crime absent some intent that it be used illegally, in which case there might be an "attempt" to commit a crime offense, or an offense that would make one part of a conspiracy to commit a crime. In the "leaving it around" example, there is arguably an intent to use it to harm another improperly, although the phrasing is ambivalent. While many statutes in the U.S. criminalize possession of burglary tools, or drug paraphernalia, sometimes with an associated intent element (although even these crimes often have an express or judicially implied intent to use element), I'm not aware of any statute that criminalize possession of tools for malicious destruction of property. So, if the tools aren't possessed or used in a manner intended as a step in the facilitation of a crime, I don't think that any law is violated. So far as I know, the U.S. does not have a counterpart to Section 37 of the British statute cited above (it isn't a terribly easy thing to search for to definitively rule out the existence of such a law because federal law has many uncodified crimes in unexpected statutes and there are many sets of state criminal statutes, not all of which are codified either). The example giving in the comments by @gnasher729 of possession of a hammer which could be used to do the same things that this object could be used to do is instructive. Arguably, this USB-like tool is more specifically targeted at malicious conduct. But, for example, when I used to work as a radio news reporter, we had a machine that was basically a high powered magnet that was specifically designed to destroy all information on magnetic media. This was, in part, so that it could be reused, but it was also so that confidential interviews wouldn't fall into the wrong hands once they were no longer needed, in much the way that one might shred paper documents. It isn't so implausible to think that a device like this one might be necessary for individuals or firms with national defense secrets embedded in their hardware and software to have on hand in order to destroy a sensitive computer in order to prevent a security breach, if necessary. In a case like that, leaving one of these devices around the office unlabeled might be negligent, but wouldn't have the intent necessary to be an intended crime. And, it is hard to imagine that the device itself, which seems pretty simple, would itself involve any technology that is a national security secret, so it probably wouldn't violate export control laws. Of course, possession, purchase or sale of such a specialized device, or leaving it around unlabeled would certainly be powerful evidence of an intent to use the device in a wrongful manner, and hence, of an attempt to commit a crime. Indeed, possession of such a device or purchase of one might very well be sufficient to establish probable cause to seize the device and arrest the person holding it on charges of an attempt to destroy a computer. But, this device would be merely powerful evidence of an intent to commit a crime, rather than something that is a crime to commit in and of itself. There are no international laws that govern this kind of thing. The only international laws applicable to individuals pertain to war crimes and nuclear and chemical weapons. Even then, most international laws direct member nations to adopt domestic laws on the subject rather than being self-executing.
I'm a notary. If someone showed me a marked-up license, I'd refuse to perform the notarization, and make a note of the persons name and phone number, to make sure I would never make another appointment with the person. Is there a law that says I have to refuse? I don't think so. Is there is a law that says I can refuse if I have any doubts about the person's identity? Absolutely.
In the United States, no. For something to be illegal in any meaningful way, you have to be able to point to a law that makes it illegal. If there's no law to break, it's not illegal. I would wonder if your colleague was thinking about question of whether cryptocurrencies are legal tender. For something to be "legal tender," there would need to be some kind of law or regulation requiring people to accept them as payment. There is no such requirement in the United States, so Bitcoin, for instance, is not legal tender. But that doesn't make it illegal tender; it just means that people can decide whether to accept it or not.
A book (or any other creative work) published in the 1800s is now in the public domain everywhere in the world (excepting odd cases like Peter Pan where a special rule applies in some jurisdictions.) Anyone may legally quote from such a work at any length with no legal requirement for permission. In fact there is no legal requirement to attribute the quote to the author (although there is an ethical requirement). In fact one may publish a new edition of such a work, unchanged or modified in any way one chooses, with no legal need to obtain permission from anyone or to pay any royalties or fees. If the work were recent enough to still be protected by copyright, a limited quote could be used under fair use, fair dealing or another exception to copyright under the laws of most countries. The exact rules vary by country, and are often highly fact-dependent, so the exact details will matter. If one wanted to quote enough from a recent work that permission is required, the copyright holder, who is often not the publisher, would need to grant permission. That is often the author or the author's heir, but it can be a person or firm to which the author transferred the rights. Sometimes the rights-holder can be hard to identify. Update: it would be possible for a work published in, say, 1890 by an author then young who lived to a fairly old age, dying in, say 1960, to still be protected in some countries, although not in the US. (Anything published before 1925 is now PD in the US.) But Charlotte Bronte died in 1855, and all of her work has long been in the public domain