whaddya got?

[zeedonk]

Boys V summer league, very good ball. A1 gets ball in post and turns and attempts shot. B1 grabs A1's arm-tweet! As I hit whistle A1regroups and jumps into B2 (pretty much all happened in a quick second or two- htbt).
B1 argues call with me after I report- "why no offensive foul?" I explain his foul was first and subsequent contact was incidental, and if he didn't grab the arm it WOULD have been a pc foul.
All this happens immediately after reporting and I turn to head opposite table when we are in each others way and brush past each other as happens many times during any game. I reach out to stop us from colliding an give him a little pat on the back as I go by. B1 then pushes my arms off of him and says loudly but not screamingly "get your hands off me! Don't touch me!" Bang- unsporting T, which is immediately met with "I don't give a. ***k!" and B1 is shown the door. He had not been a problem until.right then and the game was spirited but under control.
There have been some recent discussions about touching coaches and players so.I thought I'd relay this for comment. I don't usually touch anyone, but do on occasion offer the pat on the rump (boys only) or reach out to stop a player from walking into me. Most of.the time it seems to help in terms of communication with players, but only if the conversation is going well.
It should be noted that I initially whacked him for the combo push and verbal retort. Would most likely have just had a brief and clear comment about knocking it off if he only did one or the other. 2nd whack was self explanatory.

Thoughts?