1. If your kids are under the age of 5
2. If you're heavily involved in your neighborhood community
3. Probably some other good reason I can't come up with
My entire trick-or-treating childhood was running around half the town loving every minute of all the decorated houses, random costumes, and filling my pillow case to the brim before all the porch lights go out.
It's the ultimate kid holiday. If I had been stuck in a church parking lot I'd have been very upset.