A event that can only be applied by a super admin/the host. Upon a player triggering it, he will be kicked from the server.
A way this could be useful is when you have a map that requires shaders to be on, and if a player has it off and you have a door that's seen with shaders off then he walks into the door, he gets kicked for "Turn shaders on!" That is a trap that could prevent people who turn off shaders on a map that should be played with shaders on, as having shaders off sometimes gives a advantage.