Wearing a mask is rather blunt. I think surveillance evading camouflage make-up instead will turn out to be a fashion trend during the next decade.
As with any trend, only a handful of people would dare walk around looking like that at first - privacy supporters, activists, etc. - and they would stand out in the crowd. But the idea of camouflage might catch on as more people opted-in (some because of privacy concerns, others because it just looks cool and futuristic). Kind of like torn jeans and facial piercings from punk - they used to look shocking to some a while back, but nowadays are completely mainstream and disconnected from the originating subculture.