I have never been asked to leave, and have been passed by dozens of cops, etc. I believe that there are few laws that
prevent public property metal-detecting. However the most important thing has always been, learn to dig small holes
and pop good plugs, so that the hole you fill in looks as good as you can make it look. You have to dig on Pub Prop as
though at any moment someone from some department will walk up on you and say WTF? You should be able to say
"Well look here and here and here...my holes look pretty doggone neat. People hate to see ugly piles of crap that bad
detectorists leave behind. I used to carry a piece of cardboard to pile any dirt on, so that when it came time to fill in
the holes, there was not a lot of random dirt laying around in the grass. I also really like detecting on plain old dirt, lol.
It's a lot easier to fill holes. If you treat other people's grass the way you would your own lawn, it makes you good
enough to get very little crap. I hear signals in my yard, and I still haven't dug em. I worked a long time to fix my
St. Augustine lawn and hate to dig holes in it.