I want to know how much tape though. A very tiny piece that doesn't even cover the entire mouth and you can still stick your tongue out OR a long strip that wraps around the head a couple of times?
And comparing it to a horror movie? Get real!

Its not like the kids were bound and gagged. I'm sure their hands weren't tied and they could remove the tape themselves at anytime.
Guess I'm another who would be a bad parent by todays' standards. I believe she must have told them to stop plenty of times and even talked to the parents about it.