Ok Devil's advocate here. What if they never act on these misfires in the brain beyond making anime jokes. They never lay a finger on a child they don't even discuss ditling kids again beyond anime jokes. I mean as much as Teth's insult may have been a bit uncalled for but he DOES have a point. There have been those that have augured video games are the gateway to youths becoming violent felons and satanist, and there are others that have argued being Christian or Jewish is a mental disorder. How far do you go with this?
If they never act on or voice said perversions the point is moot as no one else is aware or said perversions. Thus no one outside of themselves can possibly know and rightfully enact violent elimation on said degenerate. Still though having such thoughts is an inherent danger to society and acting on such is destructive to society and thus evil. Now as for the examples that you gave in your post,those are obvious and demonstrably nonsense. As religion is the default postion of the human animal and lack thereof is in fact the aberration. Since the vast vast majority of all humans who have ever lived,currently live,or are likely to in the future live are some flavor of religious. Yet most of said humans have been able to operate within a society perfectly fine.