The courts, the laws, and the judicial system have decided what is and isn't legal. Should they filter results by country? Sure! and I'm not saying they shouldn't.

The government has made its decisions on this many times. They're largely following the patterns laid out in those lawsuits cases laws etc.

Can't imagine anyone disagreeing the sites they are banning don't distribute illegal content as a primary reason why people visit them in the first place.

I'd say thats a good (and strong) litmus test for this sort of thing.