[JRutledge]

I do not have an easy answer for you. I think you just have to see the play enough to know. I will say this, I will and have called fouls when the offensive player or screener starts using their arms and hips to keep them away from the ball handler as they go to the basket. A lot of people allow this to take place without any penalty. I think you have to use your best judgment. You know when the offensive player without the ball is trying to move to give space if you see it enough.

Peace