If its not simple enough to use for someone with a 6th grade reading/comprehension level then it will not be widespread (I think that's about 50% of adults in U

If its not simple enough to use for someone with a 6th grade reading/comprehension level then it will not be widespread (I think that's about 50% of adults in US). I think de-centralized as a concept fails that test. Widespread meaning 100's of millions of users aka people's grandmothers are on it. If a free service requires fairly involved explanation of how it works, its not going to catch on. So the problems you are asking about don't need solving because the nature of a de-centralized social network prohibits widespread adoption. Previous flavors of decentralized internet forums never gained widespread usage either and the people that administered them typically didn't want them to.