There are a couple of girls at dd's school who are persistently trying to take photos of her, though she's asked them not to many times. They will throw pens at her to get her to turn round etc. Obviously there's more to it than that, in that the girls are bullying her to the extent that other pupils are reporting it to teachers, tutor and HoY.
Anyway, this latest thing with the photos: dh thinks that if they were to publish a pic of dd to the web that it would be actionable, and he also thinks that taking photos of her without permission is too. They're all in Y9 - 13/14 yo.
We have been very careful about pix of dd on the web, partly because she was stalked by a local man for a while (years ago now, all sorted) so she has none on her fb profile, or anywhere it would be that easy to find.