While I can understand the thinking behind this kind of organisational structure and some of the rules employed to ensure a consistantly good game experience, the problem comes with the policing of such policies and the fact that it's segments the community and creates sects of players who consider themselves the 'elite'.
These types of 'Leagues' usually employ some kind of Blacklist to prevent people from breaking those rules; break the rules and you're banned from playing. This feature has been discussed at length already on these forums, with the eventual agreement that personal Banlists are a much better method of controllong your game experience as opposed to some kind of 'Big Brother' list. Who you choose to put on your list and for what reasons are no one's business but your own.
The web-structured Karma system, which has been mentioned by already in several of Frogboy's Journals, is a much more organic way of creating this kind of system while ensuring that no one is excluded. Basically, your able to play with anyone and after the game you give someone the thumbs up, the thumbs down or nothing. The system will match you more often with people you've given the thumbs up too. Those people will give the thumbs up to others, who will be brought into your system as 'Trusted'. If you personally give them a thumbs up they become more likely to be matched with you in games. This creates small circles of friends who enjoy playing together, while not seperating them from the whole. It also removes people you don't like playing against, while not preventing them from playing the game with everyone else.
