Indirect on head coach or not?

[rainmaker]

I've never called a T for this, so I don't know the rule. Part of my reporting a foul is to put my hand up in a "stop sign" signal to the players at the table and say, "Wait." I do this everytime, and I make sure they see me everytime. Any time I see players starting to run onto the floor without being beckoned, I sprint into their visual field, and shoo them back, "Wait please! Not yet!" I guess this belongs equally in the "preventive officiating" thread.