This is already the case in Germany and many other countries. Same for phone numbers. On the other hand, I get no spam calls, and I can't access the sites on https://cuiiliste.de/domains - censorship is amazing.
Yes, surely the German government telling it's people what to do has never gotten them in trouble in the past...
If spam calls is the price I have to pay to avoid censorship then I'm okay with that. We need resilient decentralized protocols, not centralized authoritarian bodies.