[Silhouette]

It's certainly not an easy issue, but it's important to remember that privacy isn't a black and white issue either.

There is a difference between one photograph of one place at one time and a systematic collection of photographs of many places or over an extended period of time.

There is a difference between a single photograph taken by a private individual for their own use and a photograph taken by a powerful organisation to go into a large database of similar photographs.

There is a difference between a photograph taken for personal or in-house use and a photograph that will be shared with others or openly republished for anyone to see.

In all of these cases, the photograph itself may be the same, but the implications for privacy/anonymity are quite different. Once you start running computer vision algorithms on the photograph and correlating the results with other data sources, the implications go much further still.