Concise nuggets on flammable topics tend to be firestarters, and I'm afraid most people overestimate the wit part.
So, of course it makes sense that they would like the people whose privacy they are eroding to be in the dark about how much they know about them! Cos then they won't even know to protest! People are already forgetful, if the information is hidden too, in the dark Google et al will have free reign to do what they like.