There are billions of dollars at stake in the NBA. Every penny of it comes from the fans either directly or indirectly.
NBA referees have proven themselves to be criminal, biased, selfish, and incompetent on many occasions. Obviously no referee will ever be 100% perfect, but these guys, and this league, aren't even close.
Every NBA fan has the right, and possibly even the obligation, to hold the referees and the NBA as a whole accountable for their actions.
I myself am sick of the league's and some ignorant and lazy fans' casual acceptance of fouls/rules/interpetations being applied differently for star players, star teams, home teams, end of the game, playoff games, rookies, etc.
I am also sick of the much-loved ref-apologist theory "It's not the ref's fault - we should have played good enough to win (and beat the refs) and then bad calls don't matter". While this might be the frame of mind you want your players to have, it is complete bull as a logical argument, and there is absolutely no reason for anyone outside the team to wallow in that feces, or use it as some sort of false moral high-ground to "preach" to those who know better.
So if you don't want to hear fans about bad calls then crawl back in your hole and pretend it doesn't happen. And don't read threads with les such as "Late calls favoring Blazers". No one needs you to be their censor.