Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
Two cirumstances come to mind where the delete is valuable. If someone picks up your game from the waiting games list and this person is a ringer or a creep you might want to delete out. Also if someone joins a tournament that you are in at the last minute and you are thrown into a game with him sometimes it is better to delete out than have to deal with some potty mouth.