Here's a question: how on earth can a referee decide not to award a coach a time out? No matter the grounds? The Raps had possession of the ball, the game was not over, and the coach called a timeout.
Triano was stupid to call it, Collison was stupid to shoot it, but those aren't the issue here.
If the NBA wants to put a rule in place that restricts when in a game a coach can and can't use his timeouts based on the score, they should put it in the rules, and if it isn't in the rules, the ref should be disciplined.
Of course, if there is such a rule, please let me know. But I'm pretty sure this was an autonomous decision by a ref who didn't have the power to make that decision.