Now imagine a crowded street where you simply had to touch a button on your eyewear to have tags pop-up over people's heads to show real names, preferred names, and something about a favored affiliation. And others can see the same information about you.
Maybe like on this crowded sidewalk (thanks, Wikipedia) pictured above.
It would look a lot like this scene from the Violet Infohub (SLurl) shown below.
Never thought of it as a privacy issue, did you?