Then they will track them down and send in armed teams like they do when you don't register your firearms. If you resist, you die.
If spammers can continue to send Viagra ads to all and sundry, so can political types. Do the hit-and-run!
And suppose an entire country cut loose and gave the finger to the UN? They would have to undertake the expense of invading and occupying all that just to shut down a few loudmouths? Their trying to do anything of the sort should result in a massive game of whack-a-mole. Make them work hard for it!