It's a pretty big subcategory of vore kink that overlaps into pulpy horror/peril stuff, pretty much just the classic "fear + sexy = double sexy" effect that horror movies have been using for the past century.

Men being predatory creeps is an unrelated thing, as evidenced by all the vanilla cops who are violent domestic abusers or sexual predators and all the NSA scumbags using PRISM to stalk single women or their exes. The takeaway should be that we live in a patriarchal society where predatory men feel like they can push their desires on women, especially when they get an ounce of power over them, and that predatory behavior is an endemic problem unrelated to even weird kinks, and that even using kink as a cover for predatory behavior is less common than abusive creeps finding victims normally.