I know what you're getting at, and that's fair from one perspective.
To people who are socially sensitive it can be very stressful to work with these folks. When I say laid-back I figure I mean that it is more tolerant/friendly to autistic behaviour. The low standard for social skills brings in a lot of people who do productive work, at the expense of the perception of people who don't work well with autistic types. More men and boys are autistic (or close to it) than women and girls, so you'll see an even bigger split here than usual.
Basically, this domain name is typical autistic weeaboo trash (in keeping with the weeaboo handle). It's obviously not a literal endorsement of child trafficking; probably a morsel of dark humour which is more offensive than humorous if you're sensitive; or perhaps it's a tool for his work at NCMEC.
Emotional sensitivity is effectively a cancer to these communities, because a large portion of the members are incapable of it. If it takes hold in the Arch Linux community, it could collapse almost entirely.
HN has a lot of sensitive/agreeable people, so (understandable) outrage in this thread has cost me ~50 karma. It's a matter of personality, whether you see this as a sign of a healthy community, or possibly the end of an era.
Seems like this guy has a history of being a grade too abrasive for different communities. I understand why he sounds so upset in his response here.