I have to tell you that when I first saw the headline I expect this to be filed under the humor category, something a like a joke relating to Halloween being "suspicious people running around in masks" and all that.
Now I sort of wish it really was in the humor category.
It's also chilling for those of us here in the Houston area who are old enough to remember Ronald Clark O'Bryan -- the guy who poisoned his kid's Halloween candy to collect insurance money. Even though it was directed towards his child and not the ones coming to the door, it was several years before people in this area could put it behind us and be kids again (sort of) on October 31st.