Not that I care about Paprazzi countermeasures, but this is just c-l-e-v-e-r! Check this post Anti-paprazzi clutch bag gives pushy shutterbugs a taste of their own medicine from Gizmag Emerging Technology Magazine:
Celebrities looking for a way to combat those pesky paparazzi that doesn’t involve fisticuffs and a less than flattering mug shot will want to hope this new "anti-paparazzi device" makes the jump from concept to commercial availability. The concept is basically an LED flash built into a clutch purse that emits a photo ruining flash of its own when it detects the flash from a camera. ..