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They’re active branches in most cities, but they can be formed anywhere, even rural areas. If there’s a local union that’ll take you in and isn’t corporate captured (teamsters being an example of corporate captured, IMO), then sure, that can work.
But the IWW is the only union that can unionize any industry, is global in scope, and is grassroots with a revolutionary spirit.
I’m not sure how they would distinguish between the two in practice, surely they would block all piracy attempts, not just the ones going to an Italian IP address? It’s an unknown for now, but I would be hesitant to use them until it’s more clear how this could effect privacy.