Re: Dirt bags at work!
I had a buddy with a similar problem. He's a police officer so his threat may have had a little more weight, but heres is what he did.
He was finding evidence of a guy hunting his stands, ie, safety belts left behind, scent containers around his stand, etc. He could not catch the guy so he made up little laminated cards and put them on each of his treestand trees. They said something like this;
"I am XXXXXXXXXXXX and this is private property. I have grown very tired of your tresspassing and I have taken measures to put an end to it. I have contacted XXXXXXXXXXX with the XXXXXX county attorney's office to assist me with prosecution when you are caught. I have installed multiple infared camera in very descrete locations to provide as evidence when you are brought to justice. According to the XXXXXX Coutny attorney, this card, as well as the posted signs that you ignored when you entered my poroperty will make a conviction swift and easy. The XXXXX County Sheriff's Department are also aware of you tresspassing. This is your final warning."
While I know that this may not work everytime but it did work in my friends case. The signs of the tresspassing stopped showing up and his hunting improved. It is a cheap attempt and could help with "semi-honest tresspassers", if there is such a thing!
From a law enforcement prospective I must agree with the others, take your stands down. It is sad that you should have to do so but it's kind of like leaving your Harley outside your garage overnight, just too tempting for some creeps.
Good luck!