The stamping is ignored and the struggles are totally ineffectual. It's an easy way to keep him in here while getting answers out, and much better than the alternative methods. Everything else is fine, but against humans it's always... distasteful.

"They're abominations. Not just witches, either. All of us are. The world would be a better place without us in it." The voice is entirely bland, listless and uncaring and the only other noise in Stiles' darkness is the clinking sounds of glass shards tapping together. There is nothing concerning or horrifying in this situation whatsoever.

Look on the bright side! Good news, Stiles found a line to the underground he's been hunting for! Bad news, he's trapped in a closet with an implied hunter standing outside it. Win some lose some.

"I'm here observing a threat. What I don't understand is why you're here. Getting involved is beyond suicidal. That's ignoring how you're trying to go about it."