We have something like that on our Company issue BlackBerrys. When the GPS app is on the Boss gets an alarm if we cross a given "fence line" in an assigned time slot. Example, if a driver starts their route too early or goes to far out of their patrol area the boss gets a page. Or if we park for longer than 35 minutes (5 minutes over break time) It can locate us to within 9 feet. Kind of Big Brothery but if I fall down a stairway or get jumped and lose the fight someone will come find me.
Maybe there is a market for something to make your treestand impossible to collapse/take apart?