Even modest hardware can run a decent LLM. Maybe someone will open source a project to let people make their own avatars explicitly to poison the social media sites.
My biggest problem with microblogging sites is that I have never been able to get a good, interesting content feed out of them without also getting lots of noise. Following hashtags usually gives me a mountain of retweets (or whatever) and trying to follow groups of related people/subject matter experts gives me lots of irrelevant content. Community-style social media forces people to more strictly categorize their content, I think.
It makes me think of Fahrenheit 451 where everyday people would sometimes become bit actors in these long form tv/hologram shows and describe the other actors as their friends and family, even though they never actually interacted beyond the scripted bits.