So, if the owner of the stand found your ATV parked and decided to take a ride, how would you feel about that? Oh, they'd give it back when they found out it was yours, ...
C'mon guys. Whether it's on public land or not, you didn't buy the stand, you shouldn't use it. No-brainer. That you're thinking about using it at all .....
If you have a problem with it being where it is, contact your DNR/G&F and see what they say about it.