> They can tell whatever they want, but it would need to be a US court (in that case) who would do the litigation. Which they won't.

That's a pretty incomplete view of how jurisdiction works. You do probably need a US court ruling to enforce a claim against a US entity – but if that entity has any EU subsidiaries or assets, you can bet that European courts will come after those.

> Blocking for security is another thing. Maybe a good idea, maybe not - but that's another story.

As a customer/taxpayer that needs access to a service from abroad, I really don't care why I have to jump through hoops to cancel a subscription/order or pay my taxes owed.