Tell the coach or not?

[Grail]

Why not tell the coach where there are with Timeouts? Why not warn him that the clock won't start, but it is an intentional foul?

We are taught to use preventative officiating from the earliest lessons. If I'm aware that an infraction is about to happen, and it can be prevented, I do something about it. Obviously I can't stop a player from fouling, and I can't stop the player from stepping out of bounds. But I can remind players in the lane to keep moving, and I can remind players to keep their hands off, and I can remind players to wait for the ball to hit before entering the lane on a rebound attempt. Why not do it?

The only thing I keep in mind is that I warn both coaches when they are low or out of timeouts. I don't play favorites. Both teams are entitled to the information if I've got it.