Well if I were still in CA doing this, where there isn't a law protecting me from just that kind of scenario, I could definitely get behind it. In my neck of the woods, cops don't bring people to the PD for interviews during defensive shoots...they get to go home and keep their guns. The range used for the 15 mins per student to do their qualifying shoot is insured and they sign a waiver when they enter the range. If there's a negligent shooting from a student, with my gun, and my ammo, but no reasonable suspicion that I instructed said student to act negligently (as the law says), the judges here would toss such a civil claim and quote the great Sweet Brown and say, "Ain't nobody got time fo dat!"
But seriously, knowing the county prosecutor, who is also a shooter and friend, and seeing the no nonsense judges around here, and not being in an area where people sue for stupid crap like they do in other states where they'd succeed, I'm not too worried about being dragged through it.
Guess I"m answering my own question here. But thanks for the safe answer, I kinda expected that.