My doorbell rang again... this time, I remembered the peephole, but I saw what looked like a uniform shirt with a name tag on a solo, young guy. So, I opened the door. He introduced himself as "from XX Baptist Church" and asked if I'd like to come visit. I explained that I'm atheist, but this guy figured I didn't understand the options. He thought I wouldn't understand that I'll be "missing out on heaven" and if I'd just read the bible I'd know god's plan for me. I just took a deep breath, informed him I've read the bible, and I know there's nothing after death. I don't think they're training their door-knockers too well, these days, because he just looked kinda scared and shuffled off as quickly as his feet would move.
I give these door to door saps a chance, to those who insist that you're too nice I like to mention that recklessly angry theists are what drove some of us away from theology in some cases.
It's understandable to be annoyed, but to lash out with anger just feeds the rhetoric that all atheists are just angry, misguided, brutes, who just need a lil bit 'o' Jezzzzuuusssssss-a!
Granted if they're particularly thick-headed, or are causing offence themselves, then let fly with the anger.