What to do about images whose author is unknown? Just as an example, images like this http://www.wallpapersxl.com/wallpaper/1366x768/lord-of-the-rings-nature-69103.html are all around the web. They all feature the lotr ring inscription, and backgrounds in different colors. They appear on many wallpaper sites, and are used on websites by many people. Is that legal? I was unable to make out the original author, because everyone is using them and apparently no one cares about giving sources. Could I use images like this in my own projects?
Everything you see there is copyright and trademark the Tolkien estate or a derivative work thereof. It's all illegal.
I'm not a lawyer, but under the law as it's written, I see two problems: 17 USC 121 allows "authorized entities" to make and publish accessible copies of works. An "authorized entity" is defined as a nonprofit organization or a governmental agency that has a primary mission to provide specialized services relating to training, education, or adaptive reading or information access needs of blind or other persons with disabilities. So if you, as a private citizen, decide to do this, it could conceivably be copyright infringement. You might have to set up some kind of non-profit organization to make it legal. It's also OK (I think) if you make such copies for your own personal use, so long as you don't redistribute them. So far as I can tell, nothing under 17 USC 121 requires the original publisher to provide an "authorized entity" with a copy in any particular format (PDF, paper, or otherwise) for making accessible copies. Basically, the law seems to have envisioned organizations of sighted people purchasing paper copies, transcribing them, and republishing them; not blind individuals doing electronic transcription for themselves. It might still be worth contacting Hal Leonard and asking what they can do for you, but unfortunately it doesn't look like the law requires them to do anything for you. As Nij points out in the comments, this really seems to be a question about the company's policy, rather than the law.
Ideas (methods of playing, game mechanics, strategy, goals) cannot be protected by copyright. But any part of a creative work can. So, no copying of drawings, patterns, images, sounds, or the element. I suppose copying the software code is not an issue here, but it can, obviously, also not be copied. And nothing in your game can look like someone's else trademark.
You can report it to the publisher(s) Protection of copyright is a matter for the individual rights holder: some (I’m looking at you Disney) are vigilant, thorough and draconian in protecting their rights, others don’t care at all. Unless you are the rights holder it’s none of your business. In much the same way that the guy charging your neighbour for 4 hours gardening but being long gone in 2 isn’t. If you like your neighbour or feel duty bound to do something, you tell them and then leave it to them what they do with it. This is not a matter for the authorities as it doesn’t rise to the level of criminal copyright infringement. Just like the gardener above, this isn’t a crime.
Assuming Chegg own the copyright, then they can restrict the activities that copyright protects The statement you quote is no more or less than the rights granted to them by copyright law. Basically, it's their stuff, they get to decide how you can use it. However, that does not necessarily mean that the uses that you have nominated are prohibited. For that, we would have to look at the specific fair use or fair dealing exemptions to copyright protection where you are. It's likely that both of your usage scenarios would meet fair use and probably fair dealing (which is harder to meet). You may also find that, buried somewhere in those massive terms of use, is something that deals with this directly.
That would be pretty much a classical case of copyright infringement. Drawing a thing from memory is copying just as much as drawing a thing with the original before you or xeroxing a thing. The degree of match between the original and your copy may vary depending on how good your memory is, but that doesn't matter, because copyright protection is not about "making exact replicas", it is about copying in any form.
A web site that is serious on protecting some content behind a paywall will put the protected content, or a version of the page with both protected and unprotected content, on separate page or pages, so arranged that a user will not be able to follow the link until that user has signed in and been accepted as an authorized user. A site that merely uses CSS to hide "protected" content is not really protecting it. CSS is designed to be modified by the ultimate user -- that is part of its function. If the site chooses to send you content, you are entitled to read it. Even if some of the content has a CSS tag attached which suppresses or obscures the display of that content, they know perfectly well that any user can supersede this with local CSS, and so I don't see how they have any legal claim, nor any way of knowing if you have accessed the "hidden" content or not. If you attempt to bypass or hack a login screen, that might be circumvention under the US DMCA, or "Unauthorized computer access" under any of several laws.
Copyright Prominent at the bottom of the page is: © RealClearPolitics 2015 This is nice because it tells you who you have to approach for a licence. If it wasn't there the material would still be copyright you just wouldn't know who owned the copyright. Questions So: If I'm looking to build an app or write a book and I wish to use statistics, am I allowed to basically use their numbers as long as I cite where it is coming from? No, unless what you do constitutes fair use and I don't think it does. If I do make a profit from it, do I owe any royalties to the original scientists/surveyers? No, but you would owe whatever licence fee you negotiated with the copyright holder, ostensibly RealClearPolitics. Must I ask them for permission? Yes, unless you are OK with running the risk of being sued. Commentary I see books reference hundreds of studies all the time This is because they are generally protected by Academic Fair Use public polls should be open information to everyone The only public poll that I know of is an election and that information is available. What you are looking at is a private poll commissioned by and paid for by RealClearPolitics and it is their intellectual property; why should that "be open information to everyone"? commercial interests may be legally entangling Always