Not so - you just have to make an overt statement that you are abandoning your rights. For example, I hereby waive any and all copyrights in this Hacker News comment, now and forever. Enjoy!
See paragraph 22 in this entertaining and interesting opinion about the copyright status of user-created videogame levels for a more detailed explanation; as far as I'm aware nothing has changed since then: http://ftp.resource.org/courts.gov/c/F3/154/154.F3d.1107.htm...
See paragraph 22 in this entertaining and interesting opinion about the copyright status of user-created videogame levels for a more detailed explanation; as far as I'm aware nothing has changed since then: http://ftp.resource.org/courts.gov/c/F3/154/154.F3d.1107.htm...