Does using pirated software to gain money to pay for the same software make me liable? If I use a music program illegally to make my own music, sell it, get money, and buy the same program legally while also deleting all pirated versions having not accepted the EULA before I have started doing the program illegally, can I be held liable upon inspection? P.S. Does the asking of this question make me more liable? Can the American police find me in the EU where the laws might be different regarding surveillance? In my country's law, any illegally obtained evidence such as spying on someone is automatically an invalid evidence no matter what. But what if multiple laws collide?
In my opinion, your question is no different from "If I steal money from a bank to pay off my credit card in the same bank, can I be held liable for stealing". I think the obvious answer is yes for both your question and the modified one, for exactly the same reason.
You can't own a database; you might, however, own (have) the copyright to a database if you created it or the creator transferred that right to you. You can also possess a copy of a database: the question is whether it is legal. "Leaked" implies that it is taken without permission, so you might be in violation of copyright law by possessing a copy. The only databases that would escape copyright protection would be those US government works, things put in the public domain, and things publically licensed to allow copying. Plus, any database whose content fails to exhibit a modicum of creativity (Feist). A database might be inherently illegal (at least in your hands), so it would depend on what the content is. The first thing that comes to mind is a database from a child-porn website, which contains numerous illegal images: see section 110 of Title 18. "Leaked" information might involve violation of 18 USC 1030 (Computer Fraud and Abuse Act), which prohibits unauthorized hacking. It does not directly prohibit being in possession of a hacked database: but you might still be prosecuted as an accessory after the fact. (That is one of those ad libitum areas of the law where there's no way to know for sure what is and is not "okay"). If they do prosecute you, you might rely on Bartnicki v. Vopper, 532 U.S. 514, where because it was a matter of "public interest", propagation of illegally obtained material was held to be protected by the First Amendment. Also there is the case of the Pentagon Papers. At the federal level, there are no controls over storing credit card information so if you get a copy of the Target or Home Depot hacked database, there's no federal law against that (if we discount "accessory after the fact"), but there are circumstances in Minnesota where retaining such information could be illegal.
There are three main aspects to this: Its their website, and their terms of service. They can enforce those terms, or change them (in some appropriate manner). You have no recourse if they remove you, block you, or delete your account, for example. That's the measure that you would probably have, virtually every time. To claim damages, or litigate beyond just website access control, requires a legal claim. But there's a catch there. To claim damages, they need to show actual damage, which they wish to be compensated for. If you misused their website but no actual harm can be shown, the total damage claimable is zero, whether or not you followed their rules. Merely entering dishonest information isn't by itself harm. So they would have to show they suffered damage/harm because of that, which is directly attributable to your behaviour, was foreseeably harmful etc, or similar. They also need to consider legal costs, and ability to enforce, especially if you are in a different country. If for some reason the computer use was also illegal, then a criminal act could be committed and they could notify law enforcement. For example suppose you did this in the little known country of Honestania, where the law says that to prevent trolling and online abuse, anything posted on social media under any but your own legal name is a crime. Or suppose you'd been banned from the system and ignoring/evading such a ban was criminal computer use or criminal trespass due to the forbidden/unauthorised access (which can happen in several places). But this is purely for completeness; I guess you'd know if you were taking it further, into criminal computer use.
You may at your peril. The safe harbor provision in 17 USC 512 does not provide absolute immunity to service providers, that immunity is only available (c)(1) if the service provider—(A)...(ii) in the absence of such actual knowledge, is not aware of facts or circumstances from which infringing activity is apparent Given your question, which reasonably assumes that the material is infringing, infringement is apparent. The DMCA provisions were written not to protect service providers, but to protect innocent service providers who are not aware of the infringing activities of their users. So it depends on what you know.
What are exactly the legal consequences of "All rights reserved"? Almost none. You have to explicitly grant copyright rights. You don't even need the Copyright notice for them to apply. My "almost" is because the notice makes it harder for somebody to argue "they didn't realize". Do I still need an additional SW License Agreement or is the Copyright notice above + a Disclaimer of liability sufficient? If this is free software (I know you said it isn't), do yourself (and everyone else) a favour by picking a license you like. Preferably either GPL or MIT (depending on your taste). There are far too many free licenses already. Please don't add another. (It also makes it much easier for any user of your software: "Oh yeah, GPL v2. We understand that. We can use it." as opposed to "What are the implications of using this one??" As this is not free software, I think you need a paid-for lawyer (who understands IPR in your juridiction.) Edit: In principle, I believe you don't need anything. The code is copyright, so the customer can't do anything with it (without explicit permissions that you haven't granted). However if the customer doesn't realize that or thinks you won't mind, you then have to go to court to enforce your rights (and probably end up with a disgruntled customer). A short, clear, license will make it clear to the customer what they are allowed to do, and save all that aggravation.
It's not fair use. Fair use is when you do something that normally only the copyright holder can do. Playing a video game is the ordinary, intended use of the work. In the United States, ordinary use is not protected by copyright. 17 USC 106 sets out the rights protected by copyright. The include copying the work, producing derivative works, distributing the work, and so on. None of these are ordinary use. Someone could perhaps argue that you are creating a derivative work. I doubt that argument would work because you are not taking any protectable elements from the work. But if anyone did argue that, it would make sense to also argue that if that's so, your use would still be covered under fair use because it's transformative, does not substitute for the original work in any way, and takes very little of the work.
It is likely that the law applying will be both that of the USA and your country. If you went to court this would be one of the things you argued over. For example, Australian Consumer Law applies to any goods or services sold to a customer in Australia irrespective of where the vendor is located. Your jurisdiction may have similar laws. At first blush you must comply with the term of the contract preventing reverse engineering. They would be within their rights to terminate the licence if you don't. However, they probably have an obligation under your equivalent to the ACL to supply a product that: is merchantable is fit for purpose does what it says it will do If it doesn't then you have a right to terminate and get your money back, sue for damages and your country's government may prosecute.
You seem to assume that copyrights require paperwork such as registration. This is wrong, copyright is automatic. And it prevents the downloader from making the sort of change that you suggest. In fact, it prevents the downloader from using your template at all. The only reason the downloader can use that template is because you've granted him a specific license to ignore some copyright rules, but the default remains. And you did not grant the right to alter the template to free users.