Depends on whom you take a photo off, where and from where.
It's a complicated matter juristically, but the morale is easy. Don't take a photograph of someone visible in your photo without their consent. If so, at least don't upload it anywhere public or online.
In Germany there's a law giving you the copyright on your own photo[1], it's difficult in the USA and less difficult in other countries[2]
EDIT:
Voice recordings are practically illegal in the public without consent in Germany[3] and also in the USA [4][5].
In Germany there's a law giving you the copyright on your own photo[1], it's difficult in the USA and less difficult in other countries[2]
EDIT:
Voice recordings are practically illegal in the public without consent in Germany[3] and also in the USA [4][5].
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[1] https://de.wikipedia.org/wiki/Recht_am_eigenen_Bild_(Deutsch...
[2] https://en.wikipedia.org/wiki/Photography_and_the_law
[3] https://dejure.org/gesetze/StGB/201.html
[4] https://en.wikipedia.org/wiki/Legality_of_recording_by_civil...
[5] https://www.rcfp.org/browse-media-law-resources/digital-jour...