While I agree with you that shenanigans are virtually guaranteed, I don't think your two methods will work. They certainly could try to limit it to Europe, but

While I agree with you that shenanigans are virtually guaranteed, I don't think your two methods will work. They certainly could try to limit it to Europe, but they won't be able to limit it only to European soil. Travelers who find their sideloaded apps disabled or deleted will complain, and they'll be subject to fines again. The other one would be problematic too... sabotaging the phone when it's legally compliant will see an even swifter crackdown.