I think opinions about this are partially or wholly based on where you hunt and the hunting pressure there.
Here in Idaho; I have found hunters in my stands; which are my property; that were put there by outfitters - who didn't care right from wrong.
I have left people in the stands; but I let them know the situation.
A couple years ago I had a bear bait out; in Idaho; you have to have a bear baiting tag to set out bait; but not to hunt over a bait.
So I put up an Ameristep blind there; and when I came back the next day a rifle hunter had found the bait and stand while driving around in the woods on his atv. He put an illegal bait on my bait pile- tagged with my tag; and then with fishy fingers moved my blind so that it better served his rifle needs.
After he left; with the intent of returning to use my blind; the bears came in and chewed holes where he touched the blind with his fishy fingers.
Now I bought that blind; I put out and tagged the bait; and his putting an illegal bait on my pile ( filleted out steelhead) I could have ended up with a ticket for it.
So; he used my blind; the bears broke one of the support rods; and moved my blind and put me in the position to get a ticket for the bait.
I had an encounter with this guy that was not pleasant; it was loud and I still have bitter feelings about it. He has not shown back up since.
I used to be an avid duck hunter; and the rule on rivers and public lakes was the first person to the blind had the legal right to use it; and I had and have no problem with that.
But I live surrounded by public land; with low hunter pressure. In fact - if I see another bowhunter- we end up working together not against each other.
A treestand and a pop up blind cost money. To take them is stealing. To use them in a way to destroy them is destruction of private property.
In duck hunting in high pressure areas I have seen a draw system for blinds. You show up in the dark and draw a blind to use for the day.
That worked fine in crowed areas; and you might find that system used in high pressure deer hunting areas.
That or banning treestands and double bull type blinds.
But - again- if your stand is rated at 250 pounds; and some 300 pound man falls out of it... well you know the legal system.
Again - so much of this varies from one state to another and one situation to another.
Nobody owns the public lands; or a specific spot in it. But - if theft is a way of life for hunting; then banning stands is probably in the future.
That or learning to get along with each other.
And in Idaho; outfitters have treestands and spots for bear baits and wallows; and while individuals are on their own in conflicts; guides typically 'own' areas and spots.
As hunter numbers increase; conflicts like these are bound to go up.
Rules are better than violence. But violence does work.
It will be interesting to see how this topic changes over the coming years....