Oh, I love black humor too and I constantly joke with my best friend that we're probably going to Hell for our terrible sense of humor.
But I believe in what George Carlin used to say, that you can joke about anything. That's what joking's for.
I refuse to get embarrassed by my jokes. I have a pretty dark humor, you know? I mean, I don't pick on people with a very vanilla sense of humor and tell them to be ashamed, do I? ;)