If You Think I'm Bad, Get a Load of This Guy!
Take a look at this video (not work safe; has cursing and dog feces). I may not be the most respectful person in the world towards the beliefs of Christians, but at least I don't do stuff like this:
David Mills video.
This is part of the Blasphemy Challenge, where non-theists were challenged to post videos of themselves denying the Holy Spirit. Not quite sure what the point of that exercise was other than to piss Christians off. Though I did see posts from a few non-theists who felt it was good for them, because they were actually a bit nervous about doing it, owing to lingering inculcated religious fears, and this helped them to finally put God away forever.
BTW, no, I didn't do a video. I didn't see much point. I don't make videos denying Santa Claus and the Easter Bunny either.