This is really cool, but in countries with utterly pervasive surveillance (e.g. Taiwan), this wouldn't really stop someone with access to all the cameras (i.e.,

This is really cool, but in countries with utterly pervasive surveillance (e.g. Taiwan), this wouldn't really stop someone with access to all the cameras (i.e., the government) from tracking down who you are. They'd just hop camera to camera (they're literally EVERYWHERE) until you used your train card, or got onto a vehicle you own, or walk into your house. What I'd be really interested in is an anti-surveillance device that utterly dazzles cameras so as to make it impossible to track camera to camera who you are / where you're going. Combine that with the occasional costume change and you've become extremely difficult to track.