[anyidiot]

They are tracking user behavior completely anonymously

Just because you, a human, cant look at the millions of data points and go "oh look, there's george tomlinson of 28 esperay avenue doing something we dont like" doesnt mean that it cannot be done or will not be done, or indeed is not being done already.

Some of us dont want to walk around with yellow badges thank you. Do you imagine that fact that the badges are only visible to those with the resources and motive to discover them, and not the average joe, is more, or less of a motivation for privacy?