On: Google's updated privacy policy states it can use ...

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I’m so sorry, I left out the citation and had in my clipboard.

Here is is: [2] https://allaboutberlin.com/guides/photography-laws-germany

And it actually references the same article you posted.

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No problem. There is https://www.gesetze-im-internet.de/kunsturhg/__22.html plus https://www.gesetze-im-internet.de/kunsturhg/__23.html - note that it is about distributing and publishing, but that just taking a photo can trigger this somewhat, from the article I linked above:

> Nach dem Bundesverfassungsgericht (BverfGE NJW 2000, 1021) ist bereits ab diesem Punkt [that a photo is taken] ein Kontrollverlust der ohne Einwilligung abgebildeten Person über das Bild gegeben, und dieser mögliche Kontrollverlust rechtfertigt sogar unter Umständen ein Fotografierverbot.

But that is debatable and actually the point that could be outdated.

In practice, the guide is not completely wrong: You can take pictures in public spaces and they can show people, but those people should not be the focus of the image and you might want to make them unidentifiable if you publish the image.