Just this week we warned about the combination of powerful surveillance technologies, arguing that each of these tools alone is troublesome but that their combined use spells privacy disaster.

We told you so.

The combination of a gun shot detector with face recognition might not strike you as a particularly abusive form of surveillance. After all, gun shots are not very nice and no one wants them in their neighborhood.

But if those powerful cameras have the ability to zoom in on and recognize our faces if we shoot a gun, what's stopping them from doing so if we, say, hold a sign? Or are walking down the street with a hood on our heads?

The future is here. Too bad there aren't any jetpacks in it.