The US and Canada probably could. However, as a consequence it would probably be possible to go after facebooks Cashflow: no ads could be bought by European su

The US and Canada probably could. However, as a consequence it would probably be possible to go after facebooks Cashflow: no ads could be bought by European subsidiaries or companies. And that would hurt Facebook. The judiciary might also decide to go after Facebook executives. Certainly not impossible to avoid, but it’s kind of annoying if you’re used to traveling freely and all of a sudden need to be careful where you’re going. One diverted plane too much and you’re stuck in prison for a bit. In short: yes, the US/Canadian judiciary may decide not to enforce rulings of European courts, but there’s still ways to make things painful for Facebook if they choose to continue operating in Europe while not being compliant.