Here's a Reddit like fourm:
https://www.talkyard.io (I'm developing it) with a Single Sign-On API, so ... I suppose it'd be possible to connect it with a login system that checks one's crypto identity?
... Like Reddit and HN, with improvements: https://www.talkyard.io/-32/how-hacker-news-can-be-improved-... (sorry for promoting my own thing ... I don't know any other seemingly okay open source Reddit alternative though)
Interesting, that there's "lots of" discussion software, but not yet any single login system like the one you describe. (?)
> need a real physical ID to get [a crypto key]
How can that work :-) People would submit their national ID number or full name, and get back a crypto key, and there could only be one key per national ID? How can one know that the one that submits the ID number, is the person him/herself? Maybe by looking up the person in the country's telephone directory, and sending a snail mail or making a phone call to verify?
What if there was an open-source verified-real-life-identity + crypto key login system, which could be connected to all different discussion software with a Single Sign-On API?