Sit on the roof and spray kids with a hose. Let your grass grow from March on and buy a lot of garden snakes for it. Legally change your name to Marv Albert. Instead of passing out candy, give away math flash cards. Hang brussel sprouts above your door.
Kids hate brussel sprouts.
Cover your walkway with broken glass and melted butter. Four rottweilers chained to your door plus a bucket of raw meat. Do the math. Don't give any candy unless kids can quote a Bible verse. No trick means a kick in the teeth.