I don't think that will happen, because I expect Apple will do something along the lines of "unless an iDevice is signed in with an account with a verified EU credit card, and/or has been in the EU for more than 50% of the time over the last year, disable the ability to sideload and wipe all existing sideloaded apps".
I don't think Apple will use that system for this, since doing so would let everyone sideload just by setting their region to somewhere in Europe even if they're not actually there.