Left 4 Dead Patch Causes... Outcry?

"Anyone who has played Left 4 Dead on Xbox 360 has no doubt at least seen or participated in one of the many glitches, tricks, or exploits that were rampant throughout the game to give your team, or the Survivors an edge. Well, hopefully you used them while you could; those of you who played Left 4 Dead and connected to Xbox Live yesterday were prompted to download a mandatory update for the game. Fixing almost every exploit there was, and making a slew of other changes...."

"Reading it tells gamers a number of things, one being that using exploits and glitches obviously became a major part of playing the game. But why?"