As a guy who works a lot of this level, good T. With the travel league I work, as long as the focus is on the kids, I honestly don't mind if they stand and coach, even after T...now if they were being a real azz..then yes, sit em.
The amount of rules ignorance by youth travel coaches is funny. I had a guy claim to be a Varsity AC, coaching 6th grade and his PG kept putting his hand under the ball to perform his crossover...He didn't like that I called him for carry, 3 times. He had some things to say about it and followed up by "I'm a HS Varsity Assistant Coach at such and such schoool..."...to which I replied "Then Coach, you should know that is clearly a carry on Friday nights as well as Saturday mornings"...
My two hats of Ref and Coach have made me better at the other.