Any questions? Yes.
1) You completely ignore my assertion that criminals exist in all social arenas, and the fact that a criminal may be a member of a particular group does not, in and of itself, automatically incriminate the group as a whole. As an illustration, I suggested the possibility that there could be a rapist at my gun range. If I understand correctly, the reason you feel justified in dismissing my illustration is that a gun range is a place to exercise my 2nd Amendment rights, whereas a sex club is a place to exercise "deviant sexual behavior". Now, mind you, I don't give a lick about whether a particular behavior is "deviant" or not; some would say my enjoyment of shooting holes in targets is deviant. What I DO want to know is, aside from the fact that you find it "deviant", what exactly is it about their behavior that you believe makes them more likely to meet a potential kidnapper/rapist than at my gun range?
2) By the same token, what is it about their behavior that you believe puts their child at greater risk than she would have been otherwise? What's the cause-and-effect sequence that results in harm to their child that is inherently dependent on their participation in that club - i.e. a cause-and-effect sequence that ISN'T equally plausible at a gun range?
Look, it's entirely reasonable for you to say that you personally don't trust parents who would go to a swinger's club. You can have all sorts of mental associations with such imagery, and believe - perhaps even legitimately - that participation in a swinger's club makes them more likely to be bad parents. However, I argue that there is no causative relationship between being a bad parent and being a member of a swinger's club - that is, you're not AUTOMATICALLY one just because of the other - and that their behavior in no way contributed to the horror that befell their daughter.
1) I did not ignore anything - if 1% of rapists hang out at gun ranges and the remaining 99% at sex clubs, then where do YOU think children would be safer at? The parents' "behavior that I believe makes them more likely to meet a potential kidnapper/rapist than at my gun range" was the drinking / drugs / inviting total strangers back to their garage instead of, you know, watching over their children.
2) You got me there - I have no idea if Danielle was at greater risk than she would have been otherwise - given that she is DEAD, I can't imagine what the greater risk would have been. Perhaps if they also ran a brothel and meth lab out of their house, you would have a point. Now, show me ONE member of a swinger's club that is not a bad parent.