Is it illegal to post a picture on facebook without consent?

[Helene]

Unless they're pornographic pictures of your child, she is allowed to post any of HER OWN pictures that she desires, and it's perfectly legal, and she doesn't need your permission either.

This is how it goes---anything that I can see from a public place, I am allowed to take a picture of, and that picture is mine. I can post that picture anywhere I want or show it to anyone I like, without permission from anyone who might happen to be in the photo.

The only time the subject's permission is required is if I want to SELL that photo or use it to earn money. Even then it would be civil matter, not a criminal one. The police are not going to want to get involved in a family Facebook squabble.

Hope that helps.