Why So Much "Christian" Hoax Spam?

The content of this blog has been pretty heavy and academic lately, so I've decided to do something lighter, but still substantive.

I've long ago lost count of the number of times I've referred a church member to the fine folks over at Snopes for a thorough debunking of a fictitious email claim. From the friend who lost a bundle "helping" African "Christians" to liberate their wealth from an African bank (with the prospect of sharing in their wealth) to the large number of well-meaning Christians who have encouraged me down through the years to boycott Proctor & Gamble or fight Ms. O'Hare's FCC Petition to shut down religious broadcasting, it seems that a disproportionate number of these nasty, insidious email hoaxes are targeted particularly at Christians.

Who do you think is doing this, and why target us?