[JRutledge]

I see this as a no-win situation for the official. If you say something before, then coach might complain and want to argue the rule. If you only signal violation without previous communication, then the coach will could complain there was no violation and you would have to explain the situation in the anyway. What will save you is if the coach is reasonable and trusts your judgment. But as many coaches do, they tend to think we have motives we do not have, so you might have to find yourself dealing with comments that might lead to other actions needing to be taken. Think of all the times coaches go crazy over basic rules (slapping the backboard, over the back situations, uniform rules, and foul situations) and you think most coaches are going to just "let this go?" This is why this is a bad interpretation. It is also a very rare situation unlike those other things I listed.

Peace