Wow (interesting). So what we need now is some sort of Tor network for opensim ? So that I can draw a triangle on the ground in a sandbox without having the church of pythagorian monks sue me ? (hopefully not!!)
This legal disposition protects nobody, but sure as hell tries to shut down the internet as we know it. The solution : free as much of your content and creations as possible, a bloody lot of them, (Creative commons 3.0 non transposed), so that nobody can claim he designed that chair with 5 legs first. Cover it with leopard skin, moleskin, your dirty floormat texture, spikes, 8bits pixelated textures,...
Do it the way Stallman & pals did it back in the day. Flood the virtual worlds with genuinely free (as in free speech) content, but license it so that jerks won't sue you, and won't sue others because you'll have plausible proof they don't own any sort of provable copyright.
Then if they sue you, sue them. They got to have something on their grid that you (big quotes) "created first". Time to unite on the "free" front ?
(and well, agreed, such a collective would better register a DMCA agent, after all the FSF has its own lawyers to enforce free software)