Sexual predation is clearly not limited to the arts, and so-called "whisper networks" exist in every profession. And ultimately these networks always, always fail. They don't reach the most vulnerable and they don't ever remove the offender or prevent future harm.
I often wonder if abusive people are drawn to the arts, or if a certain amount of notoriety just makes people turn to shit. I am involved in a lot of different art scenes, and every single one has a whisper network about some big names who nobody feels they can address directly.