Unless I'm mistaken about 20 years ago Germany was the first country that required that Google blur people's faces and licence plates on Gmap's Street View. There was initially much opprobrium about this limitation on free expression. And many technical objections to the scale of the task of identifying all the people and blurring were raised. These technical issues were overcome. It would seem we now accept the anonymity blurring as both not only necessary but an obviously good idea.