In an interview with gamespot Tom Chilton, WoW's lead designer, mentioned some pretty choice things about arena exploits and Blizzard's stance on them. Here is exactly what he said:

GameSpy: Have you looked internally at the distribution of players doing arenas on the live realm, separating those who are playing competitively with those selling teams or just tanking games to get gear?

Tom Chilton: We don't really have any way of knowing that. We can't distinguish what the intent of a given player is, whether they consider themselves to be competitive or whether they're just doing it for the gear or whatever. Certainly as far as players who are trying to exploit the system through loopholes, we have some changes coming in a patch just a few weeks away where we'll close a lot of those loopholes.

GameSpy: Are you able to talk about those changes yet?

Tom Chilton: Not just yet.

GameSpy: But we can expect the changes will be targeted at the point-selling teams.

Tom Chilton: Point selling, personal rating selling.

GameSpy: The two big things that players seem like they're against are the point-selling teams, since you can face highly skilled and geared players at even the low ratings, and those who bring alts or friends on a team to tank a team so that they can then get a high personal rating on the real team.

Tom Chilton: Exactly, that's what we'll be addressing.

This is just awesome, hugely appreciated news. The arena system allowing players to pay gold to gain higher ratings was ruinous. Extremely geared "ringers" would constantly be leveling up characters who paid them gold to high rating, then forming a new team and starting again. This made people without the high rating requirement items constantly face players who did have them again and again in the 1500 and 1600 rating bracket. Getting rated high enough to purchase an 1850 requirement weapon was a stupid pain because of this.