I played UPA league; last match of the season was Thursday, we started the night in 2nd place. My opponent, on 2 ocassions accidentally nudged the CB prior to intending to stroke. He looked at me, acknowledging he did so - good sportsmanship.
On both ocassions I said "It's ok, just move the CB back".
While watching a different match Thursday, an opposing team player miscued on a 9B break. The CB still had a little speed and was headed towards the one ball. The player poked his stick out and slapped the CB away just before contact. I don't know if that's a foul, only that our gentlemanly team didn't take exception.
It's a game. Now if someone is an ahole in my match, I'd be tempted to call it.