What I hate about anyone pitching things door to door is just by knocking on your door they put you on the spot. Door to door sales of anything including religion and charities are the hard sell. Which I HATE. The exceptions being neighborhood kids and the volunteer fire dept.
If I'm interested in something be it God or pest control I'll seek it out. I don't need some a-hole knocking on my door at dinner time and pissing me off.
I keep a 8 X 10 photo of this kid on a stick near my front door. I hold it up the moment they start in on their pitch. It's very effective.