Let's be honest. Tracking humans is much more sophisticated than you suggest. The eye of sauron as you call it can use every mobile phone camera on the planet. Suggesting that recognition linkage has not been already matured is ridiculous. If I say a word next to someone that has a phone with a microphone it doesn't matter if I have my phone or not. I can be identified through my voice and speech patterns on someone else's device and tagged to my own metadata pool very easily... Why you worried about being tracked?  

 The mask does nothing but signal how much of a fucking moron you are and how little you understand about the true maturity of this type of technology. It was developed to identify even those wearing burkas and niqabs.  

 El mundo es un lugar muy hostil, todos tenemos secretos