Interesting -- a way to "ask" phonecams not to take your picture.  Problem is, it's probably omnidirectional and so will impact everyone trying to take a picture of anything in the vicinity.

I don't agree that this is paparazzi-proofing anyone -- how long will it take some entrepeneur to hack the controls and have a jam-free camera -- but it may well be a solution for areas that you shouldn't be using your phone cams in.  The locker room at my gym, for example, where cell phones are banned because of this.  I'd like to see this get out there commercially.

HP focuses on paparazzi-proof cameras | CNET