Put up some vitamin D lamps. Assure your neighbors you aren't growing marijuana.
Constant loud banjo music. Assure your neigbors you arent smoking marijuana.
Give lots of presents. Assure your neighbors you aren't selling marijuana.
Take lots of St. John's Wort and Garlic. Assure the paranoid bastards that live next door that these are legal herbs.
Lots of hot chocolate...and hope it snows so you can launch shovel loads of it at your paranoid neighbors.

Philibuster, watching for black helicopters. =P