At least you will know when your child says get me that toy or I'll do something bad comes from.
The teachers are setting an absolutely horrible example. You are not over reacting. It also sounds like they are punishing the entire class if one child misbehaves. Also not a good example.
I am ok with a little bit of bad behavior by teachers. The children will eventually have to enter the real world where they will occasionally (or often) have to deal with adults behaving badly. But there is a point of getting carried away, which from your description sounds like it.
