In the US, almost certainly, you would probably get a few bad actors though coming in and using the land thinking it was a free for all. Can't see it happening in places like Holland or Japan where every inch of land is worked relentlessly. In fact in Holland someone would probably complain.
Eh, densely populated countries have some of the most enthusiastic protection of public parks, woodlands, and so on. For example, when a disused airport in Berlin was converted into a public park then there was a plan to build apartments on parts of it, Berlin's voters passed a referendum blocking development of any kind. [1] The major downside to buying up land in countries like Britain and Germany is you can get mu…
But it's not a wild area, and it's probably as well looked after as most folks front lawns. What I can't see is places like Templehof being just closed off from any kind of access to allow re-wilding. Sort of like Pripyat after Chernobyl blew. It'd be cool, but I just can't see people keeping out and letting nature take over.