There's quite a lot of work going on around self sovereign identity (SSI). I follow cheqd (https://cheqd.io/) as it's part of the cosmos ecosystem and I know there are other projects out there as well in other ecosystems.

My hope is that "verifiable credentials" can be leveraged so that you can sign-up to sites anonymously but still be verified to be a real person and not a repeat user.

Progress seems to be quite slow though!