As much as I too dislike having my picture taken without consent, the reality of even small towns is that it's probable every person you pass has a camera, and pictures are plentiful as a result. Incidental pictures, pictures of an awkward moment or accident, or just something funny I think have to be expected more, if not by people actively photographing these with their phones/tablets, then passively by accidental photos and by monitoring systems.
I don't know if there is a good balance between the two since there's nothing inherently wrong about just taking a picture of your surroundings in a public place - the people there are part of what make the photo. To use an over-used expression, pin-hole sized cameras on phones were just opening pandora's box, and we can't really close that anymore. More than likely, the result of this will be photography obscuring clothing, styles, and technology, some of which others have already posted.
German law for example explicitly works like this, the stated reason being the avoidance of chilling effects that would otherwise harm democratic participation.
With US law anyways, I've not exactly been sure how remediation would work in an instance where you challenged for control and ownership of your likeness in a case like this. (e.g., a silly picture from a barwhere someone was dancing on the counter to Louie Louie or something). Once it's online, it's copied and repasted automatically by bots countless times as soon as it becomes scrapable - who is actually culpable during this?
Can you elaborate on what the German law actually states and does? This isn't challenging the notion or intent behind the German law, I just don't know how it works and would be curious to know specifically what's addressed and how the German courts have handled it.
Exemptions are provided for cases like you snapping an image of a building or a group of your friends while I am just passing by (i.e. I am just incidentally part of the picture), or police mug shots.
I, too, am seeing that technological developments change our assumptions of privacy and socially acceptable behaviour, BTW. I just wanted to point out that we as a society can also choose to prevent unwanted consequences if we deem them unacceptable.
Maybe social norms should be shaped around what people actually want, rather than what some new or old technology dictates as its default option?
And even if that's so, do they also want to have those photos tagged, their friends face-recognized, and everything ending up searchable online?
Looks more like what Google, FB etc wants -- to collect even more data for ads and stuff.
Not in any significant numbers, and mainly when being tourists.
But I think we're at the point where if you say "social norms should should be shaped around what people actually want", the onus is on you to show that people don't "actually want" to have cameras and use them.
There's a difference though, between expecting the public to witness one's own actions in that very moment, and having everyone, at any time, forever, being able to replay a recording of that moment.
The latter is something only public figures, and only in their public role, should have to expect.