10-1-2 cover it?

[fullor30]

Heard this situation the other day through the usual ref grapevine. a Sophomore girls game. Team A thrashing team B 45-3 at half. Coach of team A wants to bring in his freshmen (all ten of them), who were just playing in gym next door to play in second half. Officials tell him no, and he's upset as well as Varsity coach who has been watching.

By rule, I believe, team could, and be assessed a T for entering additional numbers after 10 minute mark.

Game management wise I'm looking for opinions on this. I've heard various opinions so far. "it's not a circus, I wouldn't allow it" to "as long as losing coach agreed and a T was assessed I don't have a problem with it."