Idk about the EU(there have been cases that were exactly this, an example would be Article 13), but I can say to you, that this devinetively happens in Germany. Our conservatives party wants to pass a law, that would track and save all your online activity(Vorratsdatenspeicherung/ data preservation) to fight “paedophiles and terrorists” they bring it up once in a while, even tho, our federal court already said, that its illegal.