Maybe, but not everyone uses the internet equally. Educated people, professors, lawyers, doctors, programmers, and others with desk jobs are more likely to par

Maybe, but not everyone uses the internet equally. Educated people, professors, lawyers, doctors, programmers, and others with desk jobs are more likely to participate heavily in social media than the uneducated and, working class, and menial laborers. Just because most people have a Facebook account doesn't mean that representation is equal, and there is no reason to expect that a preponderance of lefty posts necessarily implies systemic bias.