C. Unsolicited Idea Submissions. Riot Games values your feedback on its services and products, but please do not submit any creative ideas, suggestions or materials. Neither Riot Games nor any of its employees and/or contractors accept or consider unsolicited ideas, original creative artwork or other works, including, without limitation, ideas or suggestions for new or improved games or technologies, game or product enhancements, marketing plans or names for new games (collectively “Unsolicited Ideas”). Please do not send your Unsolicited Ideas to Riot Games or its employees and/or contractors. This policy is aimed at avoiding potential misunderstandings or disputes when Riot Games’ products or services might seem similar to Unsolicited Ideas that are submitted. If you do submit your Unsolicited Ideas to Riot Games or to any of its employees and/or contractors despite this policy, then you hereby acknowledge and agree that, from the time of transmission or dispatch, you grant Riot Games and its designees a worldwide, perpetual, irrevocable, sublicenseable, transferable, assignable, non-exclusive and royalty-free right and license to use, reproduce, distribute, adapt, modify, translate, create derivative works of, publicly perform, publicly display, digitally perform, make, have made, sell, offer for sale and import your Unsolicited Ideas, including, without limitation, all copyrights, trademarks, trade secrets, patents, industrial rights and all other intellectual and proprietary rights related thereto, in any media now known or hereafter developed, for any purpose whatsoever, commercial or otherwise, including, without limitation, giving the Unsolicited Ideas to others, without any compensation to you. To the extent necessary, you agree that you undertake to execute and deliver any and all documents and perform any and all actions necessary or desirable to ensure that the rights to use the Unsolicited Ideas granted to Riot Games as specified above are valid, effective and enforceable. You also give up any claim that any use by Riot Games and/or its licensees of your Unsolicited Ideas violates any of your rights, including but not limited to moral rights, privacy rights, rights to publicity, proprietary or other rights, and/or rights to credit for the material or ideas set for therein.
The above doesn't technically state anything submitted through the forums, or boards in this case, the way that it would be circumvented is if you posted something asking riot to utilize your artwork. Interestingly enough some of these terms of service agreements are superseded by US Law. The US actually has some pretty strict artist rights laws surprisingly.
