From Strategyinformer.com: "Valve doesn’t want you to go to the toilet. Neither does it like the idea of you running downstairs for a drink. How about a change of scenery? Denied. Maybe a ten minute break to stretch your legs? No.
Anyone now playing Classic Competitive (i.e. Counter-Strike in its most enjoyable form (CS)) will find themselves tied to the server they’re in until the match is over. No leaving for a new map; no jumping into another friend’s game. You’re stuck; committed; chained up for thirty rounds with no escape.".