Spez401, there HAS to be more to that story than that. Like, it must be on Mel Fisher's site or something. But if it IS true, that somewhere, somehow, someone got his detector confiscated for something as innocous as a friggin public school yard, it is the exception. And I mean BIG exception. For that matter, I'm sure someone got thrown in jail for a night for a tail-light infraction, but that won't make me afraid to drive.
101 Coinshooter, your "no" story is pretty telling. The danger you face now, is that although everyone doesn't care, one of those people who gave you a "no", might now drive by, see you, recall the earlier inquiry, and boot you

But if you'd never asked, you'd probably have never been paid attention to, by that very same person. That is the danger in asking, is that it draws attention to yourself, and this hobby, as if.... something were inherently
wrong with this, that you had to ask to begin with! Doh. Think of yourself as someone no different than that person playing basket ball after hours. I bet they didn't "ask". (but if they had, they'd probably have been told "no")
Although I don't ask for public schools, I would imagine that if I DID waltz into their office to ask (be sure to have a digger in your hand, lest they not fully understand the implications

), I'd probably get a lot of no's too. I mean, think of it, why should THEY be bothered? Yet anyone here in towns around me can detect till their blue in the face, and no one cares, so long as they aren't doing it while school is in session, leaving holes, etc....
I met up with 3 friends last Saturday, and we hit a local school for several hours, and never had a problem. We got an 1896 IH, a handful of wheaties, a '41 merc, a gold earing, and a silver ring.
Born-to-detect, you say: "All land is owned or cared for by someone" Yup, the public schools are owned by US, and cared for by US, as in .... we-the-people.