I have really mixed feelings here. I have some sympathy for a teacher in that situation. If someone takes a picture of her students and publishes it, it can hu

I have really mixed feelings here. I have some sympathy for a teacher in that situation. If someone takes a picture of her students and publishes it, it can hurt them or her depending on context. That risk disappears if the picture disappears. And I do think it's generally OK to ask people not to exercise their rights as a favor: I might ask a neighbor to move their car to free up a legally occupied parking spot for a disabled relative; someone with children might ask adults not to use legal but racist or misogynist language in front of their kids. I agree it's a slippery slope, especially if she's a public school teacher and bound by your countries' free speech, etc., laws (and more likely to have the advantage if she calls police).