That last one is easy, at least: ban ad-driven social media as a business model.
Being pseudonymous is key, but it's also the valuable part.
That does not seem to be they key on Facebook.
It's hard enough for the existing companies. (And yes, I think they're genuinely trying. Or at least I think Twitter is.)
What I'm certain will never happen even though I think it would be great would be to ban any sort of emotional appeal whatsoever in advertising. It's just manipulative.
Except for - businesses with users should operate through subscription revenue, rather than 3rd party ad revenue.
This makes the argument that the need to convey product information is now fully accomplished by search engines, and advertising only adds harm / manipulation.