Is it illegal to keep a video/picture if the subject asks you to delete it?

[Yeti]

There can be some variables, such as if the image was legally obtained in the first place. The exact location where it was taken can impact things, for example, and is different than if someone is simply out in public. There can also be issues as to if there was a reasonable expectation of privacy when the picture was taken -- you can't go around snapping pictures of people picking their nose in public when they think no one is watching, for example. Anyway, the picture may or may not have been legally taken.

There are then issues that come up with how the image is used. And putting it online if Janie finds the image harmful can indeed be illegal. If posted online some place like Facebook, Janie would be able to immediately file a removal request with Facebook and have it taken down.

Anyway, Hannah might technically be able to keep the picture if it was legally obtained in the first place. But what she does with it beyond herself as an individual is a whole other ballgame, and especially if posted online to intentionally harass Janie or something comparable, it's going to be illegal.

For now, I'd mainly stop giving Hannah the reaction, since she probably wouldn't even post it online other than the fact she knows Janie doesn't like it.