‘Nudify’ Apps That Use AI to ‘Undress’ Women in Photos Are Soaring in Popularity::It’s part of a worrying trend of non-consensual “deepfake” pornography being developed and distributed because of advances in artificial intelligence.
And they've been gossiping and calling each other sluts forever. Depending on the social group, just the accusation alone is enough to harass someone, because kids are idiots, and because it's not even about people believing the accusation is true. The accusation is just a way for a bully to signal to their followers that the target is one of the group's designated scapegoats.
I can't believe I'm about to recommend a teen comedy as a source of educational material, but you should check out the movie Mean Girls if you want to see an illustration of how this kind of bullying works. It's also pretty funny.