On your soapbox however, I would be some sort of criminal(?) for allowing my street savvy 12 yr old (who knows self defense) to go with her group of over a dozen friends trick or treating w/o parents?
My parting thoughts for you? Get a life.
Sharon Profis was presenting an App for your smartphone to track your children while Trick-or-Treating. A responsible and caring parent would go with their children while Trick-or Treating!