Countries do things like this when they're run by fools and they can do this because the fools have weapons and prisons. What good has it done the US? Can US patrons of offshore internet Bitcoin casinos no longer find them available? Not a chance.
But then on top of being completely ineffective, it causes exactly what you're saying -- other fools in other countries want to treat the foolishness as precedent for doing it themselves.
Which is why the people in the various countries should put a stop to all of it, before it spreads and they find themselves in a foreign prison because their flight had a layover in a country with a law they didn't know about. And countries themselves should retaliate like hell whenever anyone tries to do it to one of their citizens.
