A $6.00 security cable can keep an "honest person honest" and your stand attached to the tree. With the stick ladder you can probably do the same thing depending on how it's built. Is there a hole you could thread a cable through? If not can you make a small hole without compromising the ladder?
If nothing else take the ladder with you when you leave and then it's only one thing to carry and unless someone brings their own ladder or screw steps with them your stand is safe.
I know guys who have had lots of stands stolen. Ladders, climbers, hang-ons. The one common denominator is that they never put a lock on them. I've always locked mine in place and left them behind and never had one stolen. Yet.......
NC Hunter's Education Instructor
Member (What's PCCA you ask? <- Check the link)