Hi!
It's really annoying when while playing stroke game some people quit because.... whatever reason is good to quit.
Why there's no such a feature that a player can only quit the game after all other player accept it? If the player quits him/herself (ie.e by closing the window where the game was) he or she shouldn't be able to join any other game until the one that he/she quits is over.
There should be also a BLOCK PLAYER button so annoying people can be blacklisted.