For starters the problem isn't the games, or the enforcement mechanisms, it's the gamers. There are plenty of other competitive activities with "randoms" that do not result in this type of behavior.
Another issue is that there will be those that get punished/removed that will play the victim and attribute it to politics, etc. You can see this beginning already in some of the comments in this thread about "dictating morality" and "silencing non-progressive behavior."