Don’t you just find it annoying when people post photos of you online without your permission. It happens all the time though. Private Photo Clouding Badge might help. It is a device linked to an online service that allows you to locate photos of you that have been posted online, so you can delete them.
The badge has two modes: active and inactive. When switched to active mode, the device will interfere with the camera as photos of you are being taken. In “inactive mode,” the badge will code your photos by overriding the camera, so you can track where they have been uploaded.
The idea certainly seems intriguing. I would like to see how something like this could work in real life as getting rid of photos on the Internet is notoriously hard. Choe Jeong-Gyu, Jo Ara, Lee Jae Hyuck, Moon Ji Sung are responsible for this idea.