Saw a thread with a lot of high seat photos over at AR and it got me thinking.

When walking around in a forest it is correct etiquette not to climb into one to check it out?

Myself when I travelled in Austria and Germany I could never resist climbing up everyone I found to see what they were like, or try them out or to see what the shooting lanes were like. An occasional one had a door with a lock, but most were open and some were obviously abandoned with the young trees having grown too much.

But is this bad manners as I assume someone built it for their personal use. Are they considered private property even if in a public forest or park?