While reporting some one is an option, there is also the matter of "To WHOM" they are reported.
The best we can do for the moment is to keep pushing via Forums and FB groups; the preferred way to do things.
A: Many U-tube examples where some one cuts a deep plug and pulls it back to find a coin - is not the best way. In most of the parks I have done; the soil and grass type does not support this...
But many see and do without understanding. Hence many places have many clumps of dead grass and it sticks out like a sign post.
B: Permission, so many just assume that unless there is an explicit sign that says "No Detecting" then a property is fair game.
Churches, school grounds, leased property, sporting grounds, cemeteries to name a few.... And for what, a few pre decs...
Getting permission is not that hard, but you may get a lot of "NO" but once you get a "Yes" or two and you can use as a reference; many of the NO's can become YES.
I always leave feedback with the owner/management, pick up extra rubbish and show what I have found and sometimes hand over interesting items. They then feel a part of the process and you can be surprised at what can come from it.