I know a lot of people are cranky about digital IDs, but realistically there’s no avoiding it at this point: we need real, government-backed, links-to-a-specific-human-with-a-birth-certificate unique digital IDs. Then service providers can (optionally) demand it in order to register, and can prevent you from creating multiple accounts, and can ban you from their service permanently, and can vouch for you to other services that you are indeed a Real Unique Human Being.
Right now I could go create 30 sock puppet accounts to respond to this. Is that really a good thing?
Let government offer the service of “here is a way any human can certifiably identify themselves online” and let people decide what providers they want to give that info to.
If you want to use or run anonymous social media, that’s fine.
I don’t.