* Give items away that aren't candy. Good examples are bags of sand, or tooth picks.
* When you answer the door, look at the trick-or-treaters, act schocked and scared, then start screaming your head off. Slam the door, and run around the house screaming until they go away.
* Insist the trick-or-treaters each do ten push-ups before you give them candy.
* Get a catapult. Sit on your porch and catapult pumpkins at anyone who comes within 50 yards of your house. Alternatively you can use a hose.
* When people come to the door, jump out a nearby window (make sure its the ground floor..) and run as far away from the house as you can screaming.
* Answer the door dressed as a dentist. Give the trick-or-treaters a two hour lecture on tooth decay.
* Put a crown on a pumpkin, and place the pumpkin on a throne on your porch. Insist everyone must bow before the pumpkin.
* Answer the door with packets of candy bars in your hands. Look at the trick-or-treaters shockingly, then close the door. Open the door again a few seconds later, and insist you dont have any candy.
* Give the trick-or-treaters IOU's.
* Wear a surgical mask, and extra thick gloves when giving the trick-or-treaters the candy. If they hesitate, insist the candy isn't dangerous.
* If your a trick-or-treater, leave "business cards" at the houses which nobody was home.
* Stand outside your neighbours house, and send them a blank email from your handheld computer, then run away before they can read it.