I've only had it happen one time. When the player came back around, I called him over, asked his number and said "I need you to do me a favor. Right now, walk over to yoboutur coach and tell him why we are starting this game with a technical foul." He simply said "Yes, sir" and then his coach almost took his head off!

Of course I "officially" told the coach but I thought it was appropriate to have the player face the music.

Sure...10.3.4 Sit C

Fifteen minutes before the game is scheduled to start, team member A1 dunks. Two minutes later A2 dunks. RULING: A1 and A2 are both charged with a technical foul. In addition, the head coach is charged indirectly with a technical foul for each act. The two fouls are team fouls for purposes of reaching the bonus. When dunking occurs during the pregame practice period the official notifies the team member and the head coach, but does not sound the whistle. If the game is played in a state which utilizes the optional coaching box, the coach should be informed that he/she has lost the privilege of using the coaching box for the entire game.

Edit for follow up question:
What if 3 team members dunk during the pre-game practice period before the official gets a chance to tell the coach about the 1st dunk?

That's a 3rd indirect on the coach, and he's ejected. The assistant coach takes over for the game, and the coaching box may not be utilized.

This actually happened in a game in, I believe, Idaho, in around 1997 or 1998. I saw the story on ESPN.com, but haven't been able to find it since then. APparently the kids were mad at the coach, and did it intentionally. They got kicked off the team the next week.

Chances are you are not coming back to this gym . . . so I'd have fun tonight!:p