Nah, that's not how it works. You cannot police what people capture, out there in the public. It would be different if he was doing up skirt videos but he's taking pictures of whatever the fukk (probably yoga pants) she's wearing.
I work out 4-5 days a week and never had to have wear skin tight clothing for a better workout. I can probably out run and outlift all these hoes going to the gym in these skin tight outfits so what's the real point they wear that shyt? For attention. Well, she got it. If you have a problem with people taking pictures of you then don't wear certain shyt.

"Oh, he shouldn't take pictures of her" ok, again how are you going to stop it? Really. How? You know how fast you can take a phone out and snap a picture? Mere seconds. So we're going to have to go for something that can be controlled, wear less revealing shyt. Straight like that.
Something something, women and accountability...something something I can wear a g string and expect not to be bothered...etc. etc.
What a clown world we live in, in general.