I read a fascinating article a few months ago about the psychology (pathology?) of the fangirl called The Killer Crush, specifically related to the behaviour of (primarily) teen girls who develop intense feelings for notorious criminals, like James Holmes. They call themselves “Holmies”, or “Columbiners”. More recently, Dzhokhar Tsarnaev has inspired a devoted following too. There’s even a cross section of Tsarnaev/One Direction supporters.