Maybe that means there's a need for a web service that generates random and periodic posts on behalf of users to give the appearance of "Facebook normality". E.g. the website service posts random inspirational quotes from dead people or TIL from random wikipedia pages. You never have to log into Facebook and yet it seems like you're "with it".

That's actually interesting. I'd expand it to other types of activity too, but then there's the risk of alienating your friends because your bot "liked" that they divorced, or something. :)