Because on the european realms I can't see any of that. In fact on my realm pool the top 3 still consists of the three teams who trated rating with each other, the rank 1# having about 34% victories and untill recetly green gear. Hell one of them openly admitted both in private talks and tradechat what they've done and a lot of people reporting them did nothing whatsoever. They're still playing and collecting elite gear.