The largest use of DNMs is for the sale of illegal recreational drugs. Regardless of your feelings on the matter, I hope that it's clear that crimes like that fall into a different ethical category than child pornography.

>It's quite usual for career criminals to have a detailed and complicated worked-out ethical system

Not even that complicated, pretty much summed up by "no women no children"

I think you will find, that apart from the paedophiles themselves, they are universally loathed. Probably more so by criminals.

The last place a paedophile wants to be is locked up in prison.