Call me a T.O. checker. I will say that it is easier to do in 3 person crew then 2 but it was something that was drilled in my head early on in my officiating career. It seems counter-intuitive that we are talking about how we deal with coaches during every other part of the game when they are doing what they shouldn't be doing, yet when they are doing something they are by rule allowed to do, some are saying we should ignore them b/c there is too much happening ON the court.
And the point that it is a coach's responsibility to get the officials attention that they want a T.O. would seem to cover this coach running down onto the court to do just that. If the officials aren't looking, what are the supposed to do in a loud, cramped gym?