Update: take for example google/twitter/facebook and how they have a lot of control over what we do online. Because they have that info they can influence our lives. Facebook's mood experiment is a recent example. Also if a picture of an election candidate is shared a lot, that candidate gets more votes by causation. Google/twitter/facebook don't have a political agenda behind their abilities and people are concerned about their influence. It makes more sense to be concerned about politically controlled agencies.