Halloween would be the perfect cover to rob someone/commit a crime.  Everyone’s in masks, people open their door to strangers, and anything bloody or gory or strange that happens would just be chalked up to a very realistic show for Halloween.

I think I’m either going to do the Asian thing and never open my door in the future for trick-o-treaters (we never really did anyway since we didn’t have that many kids in my old neighborhood and none do it here either) and/or just put a bowl of candy outside with a sign saying “Take one” and leave it at that.