Under the unified rules of mixed martial arts, a point can be deducted for use of abusive language during a fight. I'm not sure if it says anything about the finger but Diaz has definitely been known to let out the occasional "come on, bitch." It's unsportsmanlike and I'd like to see it enforced.
It is however, a little bit funny when he does all that trash talk in a fight just to get his ass handed to him
