Excellent questions. So many of these groups do what sounds good to them without thinking through their actions at all. I hope you pointing out that they are actually impeding legitimate law enforcement will serve as a wake up call to them.

So many terms could be misconstrued. Daddy!kink leaps to my mind, which has nothing to do with children but it sounds as if it does. It's not my thing but I know and respect many people who enjoy reading and writing it and I would be incensed if they were harassed for it. From the sounds of things this may already be happening.