I'm sorry, I just don't buy into the argument that we ought to have
keg parties to keep kids from drinking unsupervised. By that logic,
we perhaps ought to keep a store of marijuana and perhaps some crack
cocaine in the house, so that they can experiment in a 'safe'
environment.

Oh, it's one thing to invite Johnny or Jill to have a beer with
Mum and Dad while watching the Super Bowl or the World Cup. It's
quite another to invite 30 or so of their best, underage, friends
over for a royal piss-up.

That's not a 'safe' environment. In fact it's bloody well dangerous.

I know a kid with a smashed-in eye socket and a detached retina
who might well be able to testify to that--- he got it at an underage
drinking party, when he asked a kid who was going off on another kid
"what's your problem?"

That's not an 'outside' example. I could give more, ranging from just
being drunk and stupid and destructive to outright violence with
bodily harm.

So this "let them do it supervised" theory that was probably what
the folks in jail were thinking is pretty much bunk.