I am not advocating that people break privacy laws. I am instead advocating that US internet businesses simply stop doing business with EU customers.

If the EU doesn't wants these services, then hopefully these services will decide to leave, and the EU citizens can decide if it was all worth it.

I am certainly going to block EU customers on all my future side projects. It really isn't worth the bother for something that I just made for fun, and isn't making many money. Easier to just block this small market wholesale.

I even found a way to block them with a single line of frontend code!

That seems perfectly fine. You'll have to watch out if you have assets/money flowing through the EU jurisdictions still as they can still fine you and take your stuff I'd you violate the GPDR.

I'd you are completely outside their jurisdiction though, there's no much they can so to you without starting a war or convincing your own government that the GPDR should be enforced.

I do think it's leaving money on the table though. The EU is 500 million people, 2/3rds more than the US and with a bigger aggregate economy. The US also has regulations that have a cost to implement so it's not like you are avoiding the issue just by focusing there