I'm guessing most of you are too cliquish to admit to it, but I'd be very surprised if you didn't all have the same reaction if I CTed you under similar circumstances. Or, for a more extreme example, if one of the tanking teams suddenly bought 5 good players and CTed you, then went back to tanking against everybody else, I think you'd be rightfully upset. Obviously that's a more extreme example, but it's the same idea - a team acting in a way that hurts another team when they have no motivation for doing so.