I won't speak for my friends and colleagues in public health, although I suspect they feel the same; I'll just speak for myself. I am nobody's nanny. But as you play with the military-industrial establishment with your health on the line, I don't mind being a referee.
The medieval roots of the door-to-door candy-collection tradition have all but been forgotten. These days Halloween is just an excuse to dress up as zombies, witches, vampires and other scary figures and to have a silly, cosy and fun time.