Binding commitments or laws preventing the adoption of this sort of scheme could be lobbied for by citizens, but in reality I think your point holds

If it comes to that, I just hope the EU courts will strike it down.

Funny that some also argue that it is why the left, no matter how extreme they are, often win in the end. The left keeps fighting, always trying to change the status quo. If a legislation attempt fails this year, they will just try again the next year. Year over year, whoever keeps fighting wins. In contrast, conservatives just want to be left alone, therefore the conservatives lose often.

Sunset clauses would be great. Every X years they have to vote to re enable the law or it becomes deactivated. 1 year of deactivation gets it wiped.