If you're talking about the secure time, you mean club/lab. Kids being dropped off won't be allowed in the OH section without their own adult. Kids already there will be moved. There will be nothing insecure about it.
And in case you didn't know, parents go in already. Totally unaccompanied. It's how you pick up your kid. They give you a yellow pass and you go in and find your kid. I was once in there a good 5 minutes before I could convince my kid to leave; the CM had to remind the kidlet that his "adult" was there for him. Once when DH went in to find him, DS was on the dance floor and the girls all dancing with him let out a huge disappointed "awwwwwww" when it became obvious DS had to go. DH let him stay until close, which meant that big scary stranger-man walked into and out of the club, all unsupervised. And that's normal, that parents go in to get their kids!
Hmm. I've never noticed that they are age specific. Even when they have Super Sloppy Science on the Lab side they invite the younger kids in (on Dream) and DS has found that it's taught to the younger level (he ends up feeling condescended to).
Are you referring to the way you have experienced it (same as me) or to the recent reports of far more, and more hours of them, OHs?
Exactly.