"What makes you think I am joking? I will not be opening my door to strangers, in this day and age"
Not opening the door is one thing but turning off lights, tv and shuddering in the dark is a bit extreme as I've read some do. I wonder why inconvinience yourself like that? Do people do this when salesmen and religios knockers too?
If I didn't want to open the door I just wouldn't even if I had the curtains open and was in full view I'd just shout "Sorry I don't want to buy anything, I'm happy with my religion thanks, sorry I don't like halloween"
Honesty surely is the best policy?