At a camp one of my evaluators told me this, "If you regret not giving a technical, you should've T'd him up" I think that this is an excellent situation that falls right into this quote.
I tend to officiate more on the side of caution, if i think there is a remote possibility i will regret not T'ing up a coach, he's gonna get whacked
j/k
Although i have been one to T up quite a few coaches, i'm sure they've all deserved it, and after seeing them in other games, their behaviour has benifitted from it.