When did Halloween become HO-lloween?

I wasn't going to write this post.  I really wasn't.  But then I was walking through the mall today and saw THIS in the window of the Halloween costume store: WHAT THE FUCK?!  I know that they call it "Wizard Academy Student" but you and I both know that that is a SLUTTY HARRY POTTER costume!!  At what point did dressing up for Halloween become an excuse to whore it up?  Seriously.  When?  When did Halloween stop being about dressing up as something creative, something original?  At what point