This was interesting.
An artist in Alberta was up against big oil and won (or so far has been winning) - he copyrighted the top six inches of his soil by putting original works of art all over it; if an oil company disturbs it, then they're up against copyright law which would involve paying out big bucks, not the puny $200 they would have to pay for 'merely' ruining farmland.
I wonder if this is a technique that could be applied in more areas - eminent domain coming to mind foremost, but also protecting habitats from clear cutting. Maybe you could dress up members of an endangered species as characters from your original play and refer to their existence as 'performance art'? I suppose you'd first need permits to create the art on land (or creatures) you don't own, which... probably won't happen. And how would you get the animals to keep their costumes on?
[Bill Murray: "Well have you tried staples?"]
Just thinking quietly out loud on computer here, but with laws increasingly favouring profits over people, maybe individuals on the right side of things need to start creatively thinking like the bad guys.