VPN farms and using remote servers are all with a bit of effort detectable. It starts a new arms race but all it takes is to catch the account misplaced once on a change to then keep that history and expose the discrepancy forever. Its going to be quite difficult to get and maintain a genuine domestic IP that is unique per account and doesn't then get shut down often.
Interestingly enough, Twitter is excellent at that. Maybe they even jump the gun.
Ever since I noticed that when you register a decent domain, someone will instantly register a Twitter account with that name, I have started trying to preempt that.
I accidentally clicked a Twitter link the other day, while apparently still logged in to an account. I was on a VPN at that moment. Instant suspension within 15 seconds. It was astonishing.
This is certainly useful as a one-time reveal since the attackers didn't think this data would leak, but now can't they prepare better?