It's remarkable, isn't it, how incredulous everyone is. It's quite difficult to accept that it's actually happening.
It could be a grift, in order to get a payout, it could be a fetish. I don't think anyone can underestimate the lengths some men will go to for, say, a humiliation fetish.
The real issue, in my opinion, is the people who are allowing it to happen.
It doesn't matter what his motivation is, a man wearing fetish clothing is being allowed to teach children. And as someone said above, locking them in so they can't escape from it, and locking parents out so they can't intervene.
Whether you condone violence in the situation or not, I can almost guarantee it's going to happen.
The man has lied, though, saying it's a medical condition. This would be perfectly easy to prove, by following him.
Surely that would be enough to fire him, if you wanted to.
They don't want to.
The truly frightening thing is there are enough adults, in the education system no less, who want children to be exposed to a man's fetish.