Lock your doors and turn off all outside lights to ward them off!
Seriously, though, the last few years we've just been turning the lights out. Most of the little kids in the immediate neighborhood had grown into their teens or their families had moved, and the number of tricker treaters had dwindled and was skewing heavily toward kids who should have been too old to be out scamming free candy with a half-assed costume.
Over the past year, though, at least two families with small children have moved into the 'hood. There are enough houses that put on pretty elaborate productions that they should be able to get their sugar fix without Roseholme Cottage's participation. Possibly next year.
