http://steamcommunity.com/id/T0aFK/
Lobby manipulation.
He sets up a HL lobby in an unpopular map like steel that he wants to play.
Then sets up another lobby in Viaduct with exaggerated restrictions, so that people get forced into joining the lobby he wants to fill.
Does this kind of suff every weekend.
This guy gets his kicks by trolling lobbies and banning anyone who he stightly dislikes, real bored manipulator type of person.