the situation on facebook is becoming more and more insufferable every single day. apart from the poisoning of the public discourse by bot armies i'm getting drowned in friend request from fake profiles.
if we were to go back to creating a social network for people we have actual social connections with, how could we design a system that ensures the people on it are real, while keeping the effort low (i.e. no manual intervention by admins, not data gathering like license upload).
maybe "bad behaviour" of a person should reflect back on the person that vouched for them, but that'd necessite some form of "social capital" you can earn or lose.
at some point you always have an incentive for people to game the system and those bad actors could probably circumvent the invite and vouching system. maybe the way for that would be to limit reach. if you get to see posts from "third parties", i.e. people you didn't chose to connect with, those can achieve reach without having direct personal connections.