Jehovah's Witnesses (who else?)
There's a Kingdom Hall not far from where I live, so the locals are forever plagued by the Witnesses (and their poor little kids who get dragged along when they'd rather be ANYWHERE else) knocking on their doors clutching copies of the Watchtower.

The father of a friend of mine from Secondary school was a trucker, so on the odd occasions when he was home from work he was usually sleeping and inevitably the Witnesses would come a knocking at this most inopportune time. So the Trucker had some handy methods to deal with them, including:

* Answering the door naked, in all his 20st glory
* Quickly daubing a Swastika on his forehead before opening the door
* Opening the door with his trousers round his ankles, snatching a copy of The Watchtower and thanking them for arriving just as he was running out of toilet paper

And possibly my favourite:

Opening the door to them at around noon, inviting them into the living room and returning to bed. They were apparently still there when Chris returned home from school at 4 that afternoon!
( applehead herp derp, Sat 21 Mar 2009, 15:29, Reply)