As to how you would implement it, Poland recently had a proposal that if you were banned from a social media website, you can appeal via the government in a certain period of time.
I'm not a lawyer, so I might be saying a bunch of nonsense here, but you could categorize the social media into topical (eg. HN is about technology) or "general purpose", off-topic services (Facebook, Youtube). Or just do it by the size of user base. Facebook has like a 2 or 3 billion users, let's not pretend it's the same as a comment section on your blog.
It's just to throw some ideas around, because again, not a lawyer, so I can't come up with a robust policy on the spot and take care of every potential loophole.
https://en.wikipedia.org/wiki/Pruneyard_Shopping_Center_v._R...
As to how you would implement it, Poland recently had a proposal that if you were banned from a social media website, you can appeal via the government in a certain period of time.
https://news.ycombinator.com/item?id=25736155
I'm not a lawyer, so I might be saying a bunch of nonsense here, but you could categorize the social media into topical (eg. HN is about technology) or "general purpose", off-topic services (Facebook, Youtube). Or just do it by the size of user base. Facebook has like a 2 or 3 billion users, let's not pretend it's the same as a comment section on your blog.
It's just to throw some ideas around, because again, not a lawyer, so I can't come up with a robust policy on the spot and take care of every potential loophole.