I get the impression this trend has peaked. For a while, young people stopped going topless on the beach, for example, for fear of photos appearing online. In the last years, it's been making a comeback. I believe it's both a sense that there's so much out there, chances are rather low someone you know will come across any photo. And that it just doesn't matter. I am absolutely certain you wouldn't be able to hurt someone with sending their work colleagues a topless photo you found, but rather risk your own job if you're found.