I think a solution to bot accounts could be a referal system. Everyone who signs up needs to be referred by another person. If the new user has negative impact

I think a solution to bot accounts could be a referal system. Everyone who signs up needs to be referred by another person. If the new user has negative impact on the platform, all parent users on the referal chain lose some sort of trust. Users can set a "trust" threshold and all content they see is filtered through that lens. It's like an automatic twitter block based on an algorithm. Also people would ask the people they refer to the platform to please not do bad things so they can preserve their "trust" rating.