I had a lock-on stolen a few years back. My recommendation is to take the bottom few steps home with you at night. Either that, or place the steps at such a distance apart that only an orangutan could climb it. Most hunters are out of shape, and lack the strength and agility to pull themselves through the steps and limbs if they are put in awkward locations.

All said, no matter what, if someone wants your stand bad enough, it's as good as gone. If they can't steal it, they'll damage or shoot it just to spite you. Kinda shameful how greedy and unethical some guys can be.