Guys can usually reign it in though. There have been lots of specific forms of frustration venting that have been prohibited and players adapt quickly.

I just think running up and screaming in a ref's face should be a quick T, especially since calls are reviewable in the NBA. If your right to be so upset, then you will win the challenge.

Challenge reviews would be a great place to allow the refs to penalize flops, if they aren't already allowed to.