I think it's hilarious that you're saying this on a site that could not exist if it was actually too dangerous to talk about your games and house rules and such. The same is true for many fora as well as places like Obsidian Portal. The field left between fair use and the uncopyrightable nature of bare rules themselves (though not their expressions) is significant.
See Bill, the unfortunate part is that there are in fact arguments being readied in various quarters to scale back these rights considerably via a novel interpretation where values and systems are treated as a form of software. These if course will be helped by communities willing to capitulate.
Copyright arises automatically upon the creation of IP, so its not "dangerous" to post things about your game or HRs or such.
USA Copyright Law
Section 107 also sets out four factors to be considered in determining whether or not a particular use is fair:
- The purpose and character of the use, including whether such use is of commercial nature or is for nonprofit educational purposes
- The nature of the copyrighted work
- The amount and substantiality of the portion used in relation to the copyrighted work as a whole
- The effect of the use upon the potential market for, or value of, the copyrighted work
In all probability, something posted on a website
like this is either subject to terms of use that would prevent someone from enforcing a copyright claim (I haven't checked anyone's terms of use to verify this) or would be deemed to be released into the public domain, barring an actual notice that the work in question was not being placed into the public domain. And if someone DID happen to put up such a notice, I wouldn't be surprised to see mods take the post down, just to cover the site from potential liability.
(I say probably because, AFAIK, nobody has ever tried to enforce such a claim.)
But lets say someone did try to assert such a claim: I seriously doubt any Court would uphold a copyright claim against someone using material from ENWorld in their private game.
What if they tried to incorporate a HR posted on ENWorld into a commercial product?
Well,
USA Copyright Law
Copyright does not protect the idea for a game, its name or title, or the method or methods for playing it. Nor does copyright protect any idea, system, method, device, or trademark material involved in developing, merchandising, or playing a game. Once a game has been made public, nothing in the copyright law prevents others from developing another game based on similar principles. Copyright protects only the particular manner of an author’s expression in literary, artistic, or musical form.
That rule would probably not be deemed to be copyrightable.
However, if you posted a monster writeup containing fluff & mechanics, that unique bit of text covering fluff would be fully copyright protected...barring the Court finding that posting it here placed it into the public domain.
What I think Bill was getting at is that if someone created IP, then someone else posted it on the internet without permission and then you used it in a commercial product, you're not protected by fair use. IOW, you put yourself at risk of a lawsuit by using material found on the internet that you don't know who its original creator is, and fair use will not help you one bit.
It will also not help you if the work is not commercial, but also not of an educational nature (that's test #1)- and that's pretty narrowly construed to cover only use in a recognized academic setting- or if the use substantially damages the market value of the copied IP (test #4).