Lots of great reasons posted here.
I have my own reasons why I no longer let people hunt on my land-
Got tired of getting screwed, Sage Groused, whatever you want to call it.
I had let people hunt with very simple rules- You make a kill, I want to see it.
Didn't think that was unreasonable..... but no, that was too much effort on their part.
Hate to bring up the topic of agreements/splitting finds here, but there are members of this forum who stated they would tell landowners to buy their own detectors and learn how to use it, if the landowners wanted a split of the finds...
Unreasonable in my opinion. What does the landowner gain for having someone detect their property?
Nothing.
Same goes for metal detecting.
I won't grant permission, based on my experiences with hunters.
Fool me once.....
I do however invite people to hunt and detect.