LeaverBuster system
Today, I received a message demanding that I agree not to leave games.
I have never left a game voluntarily. I have been occasionally prevented from connecting through a wired connection on certain occasions by as-yet-unidentified technical reasons. The software can and should be aware of the fact that the client launched, encountered X error, and refused to connect; after all, if I'm getting an error message from the client it should surely be logging that somewhere.