No one knows what Felton did either and Sulaimon is just as guilty as PJ right now. You knew that though.
It really doesn't go on all the time in summer league. It certainly doesn't go all the time when held on a screen. Like I said, if you watch the League it happens constantly. Justifying his actions with things like 'an emotional player' are just excuses, much like the ones said by a coach once to justify his actions. There are lots of emotional players in college and the pros who have never done these things.