I dare you to name a forest that someone won’t try to kick you out of pretty quickly.

The US has forest rangers, among others, as do most countries. Even in remote Siberia and Alaska, it likely won’t be long before someone defending a mining claim or similar gets you removed or tries to shoot at you, though you might get long enough in some spots to live half a life at least.

Every society I’m currently aware of has something similar going on, and they absolutely are trying to remove opportunities to stay outside of their bounds.