Please do not post any contributions to which you do not own the rights, or any derivative work under copyright law. Such actions are punishable by banning at the first or second offense, subject to moderator's and administration's judgment.
Work to which you do not hold the rights may be posted under the "fair use" exemption, but not for the purpose of contribution to this game. The "fair use" exemption was created to allow things such as commentary, parody, research and education about copyrighted works without the permission of the author. Should you make such a contribution, be sure it is legal, and be sure to accredit the copyright holder. One good place to read about the "fair use" exemption, and copyright law in general, is:http://www.templetons.com/brad/copymyths.htm