I agree with Illusions for the most part, I disagree with comparing posting glitches to why H2 got the door shut. Personally, I've only played the vs part of CT once, I'm a sp-coop guy when it comes to SC games.
Anyway, difference being that it seemed to me (I admit that I didnt play H2 on live also) that H2 got shut down because of cheating due to "hacking".
While losing to glitches ultimately must suck, as I've been there when playing GR games, its not illegal or even risky for X - S to have them posted.
So as Illusions said, its a preference of live players not to have those glitches posted. Consider it a "moral issue". But nothing against a publishers policy, or the policy of x - s. Its a flaw of the game, not one "we" created.