It works on both levels and is a nod to Franco's genius.
Lets hear it for the ladies who can't buy button up shirts!
Does nobody remember the creepy weird urban legend horror stories from before us? Bloody Mary? Candyman? Etc.
Have you spent time doing lab work? It's insanely tedious, complicated stuff, and any way to narrow down your hypothesis is always welcome.
I have to say: I never, ever understood what it really meant for something to be "triggering" until I started following this incident, tried to read Rodger's "manifesto," and learned more about the conversations/cultures on these forums.