OLDIE! I totally thought of another cool event. Basically its like a mix between Wheres waldo and Hide and Seek. Basically, you have everyone except an EC noclipped on one team, and then everyone chooses a person to be "it" or "waldo", and the person gets admin team changed to the other team, so that the person keeps their skin as the original team. Then, everyone else gets only a grenade, so they only get one try. And then, you make the round limit, like, 2 minutes or so, so if the "It" or "waldo" person survives that long, they win, and get UBER rep! lol.
Edit - Also gotta have the one hiding unable to kill i guess, but it should be obvious that you'd be found easy if you killed someone. Lol.