A while ago I commented on the girls who sit in the main office and let us subs in (in case you've forgotten). They haven't been there the last couple times I was at that school. I think I know why.
I was standing in line waiting to check in with the site secretary. I heard a commotion behind me. The girls found something funny (they were laughing and carrying on loud enough to attract attention). And the receptionist had it with them and kicked them out.
That was a pretty good run. They lasted a long time. But high school students can't keep it together forever. And besides, the weather is warming up. They don't really need a warm place to hang out so much anymore.