Originally Posted by GLASSHOPPER1955
Finally, an update.
Got in contact with the school system, who referred me to the building & grounds director. Evidently the signs were posted because of some vandalism at one or more of the schools. I was told directly by said director that these schools are public and totally open for recreational use after hours and on weekends. Had no problem with anyone metal detecting. He did agree the signs are heavy-handed but it was to help deter any more vandalism.
Looks like it's open season again for 2017.
Well well well, a sign so "ominous" as that, doesn't necessarily preclude md'ing. And although it took someone to actually tell you that (because , of course, you were erring on the side of safety), I bet that the same conclusion would likewise apply , even if he hadn't specifically said that.
What I mean is, that if, as he says, those signs are to keep vandals at bay, (and obviously a man with a detector in the sandbox is "not a vandal") then I bet if you'd simply gone, the same facts would be in effect.
These are simply "obligatory" signs (so as to enforce if perverts or vandals were causing harm), and I do not always take to mean "no detecting"