Matt, John F, & piaa_ump:
You guys are all more experienced umps than I, and you seem agreed that it's not necessary to call time to clean the plate.
Is the reason based on a pre-disposition to keep the ball live and avoid unnecessary stoppages, signals, and calls? Is it that with more experience, you have confidence to keep a lighter hand on the reins? Or is there something else going on?
I know I can respond appropriately to a situation in which a coach attempts what PitchingFan suggested (in jest, I think), and I can do so in a manner that discourages similar shenanigans by anyone who remains in the game after such a breach of decorum. But throwing my hands in the air for a fraction of a second before cleaning the plate seems like a cheap insurance policy. Otherwise, any action that occurs while I'm brushing is likely to lead to an argument.
What am I missing?
Seriously, I'm not trying to argue. Trying to learn.