Heh! Before you were comparing this to filming the children. Now you're comparing it to filming the parents. Make up your mind.
The worst you're going to find parents doing in public is flying off the handle, and maybe smacking a kid. Not good, sometimes not excusable, but nothing like the truly destructive abuse you're talking about. Parents do that shit in private.
You're just thrashing around looking for some way to defend an untenable position. Give it up.