What can we do about websites that violate our privacy?

I was looking for a pair of gym shorts and used Google reverse image search to try to find them. Instead I get recommended links to these websites where people (presumably perverted men) take photos of women’s behinds in public and post them to rate. Then they all comment on them.

I’m completely disgusted. These are young women in public completely unaware that they’re being photographed. Now I’m wondering if I’ve even been photographed and posted at some point. I wasn’t sure where to go with this but the idea of saying nothing makes me feel sick.

What can we do to get these websites taken down? Is this illegal?