Why would it be? Say you film your kid's birthday party and put it up on youtube. You just leaked voice recordings of a lot of other children. What's the harm supposed to be?
Subjective opinion time, I just think it's lame. I don't sit back and reminisce over pictures. I don't want to be in your group picture. I want to hang out with the people in the group and have a laugh.
https://www.ftc.gov/news-events/news/press-releases/2012/12/...