There is the issue. Ladder stands, lock-ons, etc. (despite the book saying you can't leave a stand for more than 24 hrs) are legal to leave at the discretion of the WMA manager. If it is mine and legal I agree with you leave it alone and don't get in it. However, our opinions do not matter and I have been told that anyone can get in your stand as it is on public property and therefore it is public property. I haven't managed it yet, but I am at least reading the card if I find a camera. If I forget the reader I have 20 SD cards in my bag of various sizes, I am swapping the card, unless I have a change of heart, but I doubt that will happen.
If it is legal for someone to get in a stand that is there, then it is legal for someone to look at the card or swap the card. NOW stealing the camera or not replacing the card is stealing and if I didn't have the cards I wouldn't take the cards.
I guess the point I am trying to make is if the rules say that anything left on public is public property then it is not yours once you put it there, so therefore, technically it is everyone's to use. IMO your options are don't put it out or accept that others may use it. I don't actually like that or agree, but it appears to be the rules, so I will follow them...