you might have more success by thinking about things that are actually happening or about to happen instead of speculating so far.

We already have a great wall of Europe, it's implemented on the US side of the ocean by websites that are afraid to somehow get in GDPR trouble or (more likely) want to put pressure to repeal GDPR.

Did you know you can do that, by the way? You can block your website in Bumfuckistan citing bill AB1234 and if your site is big enough it puts pressure to repeal that bill no matter what it's about.