As of right now I'd say the Mavs are the second most hated team by refs (although it's close). I remember reading somewhere that the refs have been known to call games based on their feelings towards the teams' owner, and that Wyc and Cuban were the two most hated owners.
It's funny when you look how much the refs love to blow the whistle for top teams like the Lakers, Heat, Bulls, even the Magic sometimes. But then watch the Celts or the Mavs and not only do they get nothing close to the favoritism those other teams get, but they are often treated worse than the worst teams in the league, especially at the end of games.
If you really want to give the most popular players in the league every single call they want go ahead, we'll play with that handicap, but don't be screwing us when it comes to the most basic calls.