I think there should be a new "Man Law"
you do not use another man's treestand without permission

Many reasons
it's not yours
you don't know if it is safe
it's not yours
when hunting i want to spend my time looking for deer, not the guy that owns the stand I'm in
it's not yours
legal or not, it just doesn't seem right to me
it's not yours
if the owner shows up, it's going to ruin the day for both of you
and lastly,
it's not yours!