He's running into a big problem over here: unlike in the US and the UK in France and Germany, amongst other countries, the rights to images taken of you do not belong to the photographer, but to the person being photographed. So he is rudely invading the privacy of people, and yes, you do have a (limited) expection of privacy even when moving in the public. I am all understanding, if you want to improve vision, but Steve Mann is recording all of this and that's crossing a big line. The same goes for the google lenses. I do recect the physical attack. However, I do not condone his filming everywhere.