Trick or treating begins at dusk, and ends a few hours after. Either trick or treaters get tired and go home or, if you are handing out candy and want to be done, unplug the decorations, turn the lights off, and stop answering the door.

It should work itself out with a bit of common sense, and regulating it for the sake of the pearl-clutchers among us seems like a solution in search of a problem. I guess some people just can't stand the thought that there may be something fun and spontaneous going on in town which is beyond their control.