"Closing the Analogue Loophole", basically in DRM there's this concept called the analogue loophole which is that no matter what you do to the storage media for your film or music (and to a lesser extent games), at some point it has to be converted to the actual output that is seen or heard by a human, and there are microphones and cameras that can then pick that signal up and recreate it, bypassing copy protection
The conference would be focused on finding a solution to the analogue loophole, and people could submit ideas and designs and maybe even make something. Of course it would all be ironic and the idea to make the most ridiculous contrived way to somehow get music or video into a person's brain while bypassing any recording devices or line splitters.
Dogmantra OP wrote
my entry would be on the use of physical space to restrict recording devices - a facehugging hood where the display is a couple of tiny screens held right in front of the eyeballs, and the hood must detect a pulse to display any video, meaning there would be no space to slide a camera in to record the screen with.