I think instead of chanting "These refs suck", fans should start chanting "What's the point spread?!"
It would be:
1.) More original - everybody chants "These refs sucks", from elementary school to the NBA.
2.) More striking - refs don't want to be reminded of possible immoral or illegal activities - especially in the NBA.
3.) More honest - Lets face it, if we're playing LA and calls aren't going our way - there's a slight possibility that something might be behind the call (the market, the superstar player, etc.)
Just an idea...