An anti-trust suit does nobody any good and the ramifications would ripple throughout the league, quite possibly affecting the other owners' bottom line - and that's not something they'd be too happy about.
It might do the Maloofs good if they get their way and move to Anaheim. Al Davis did it in 1980 and won. Then again Al Davis was rebellious, litigious, more than a little crazy and didn't care what anyone thought of him. Forget the intelligence and gumption required - do the Maloofs have the stomach to be at war with the NBA, other owners and the city of Sacramento? I doubt it.
Their preferred method seems to be passive aggressively sabotaging things while leaving themselves room to backpedal when negative sentiment heads their way.
Maybe I'm just feeling pessimistic today, but I just don't see an arena getting built in Sacramento with them as owners and I don't see them selling the team. I very much hope I'm wrong on both counts.