Oh, third option, he really wants to do phrenology and he figures if he does it on paedos no one will mind

We'll continue that trend: predicting pedophilic behavior based solely on facial features, bringing levity to an otherwise serious crime.

what is wrong with you

Really wonder if his own pictures are included in the training set (as negative examples, of course)

Could be an SSC type situation: you write an interminable pretend research post in a superficially serious manner on an obviously flawed premise and let the algorithm help it find its audience of mostly people who won't read it but will be left with the impression that the premise is at least defensible.

This will be made considerably easier once siskind puts it in his regular link roundup with a cheeky comment about how he doesn't really truly endorse this sort of thing.