I agree with clobfobble that there is a time and place for 'bad' words. I can't be going into my job and saying "that's fuckin' crazy, man" and I know how to turn it on and off. I've never understood why somebody decided that one collection of letters is any worse than any other collection of letters.
BUT, I remember my dad, when we would fake cuss, most notably saying 'dang' "that sounds too much like 'damn.'" When we were little I think he was trying to reinforce good language...because 'dang' is a dumb word, and also making sure we didn't disrespect my grandma and grandpa by saying a word as stupid as 'dang.'
And I heard my parents cuss... but I learned it was something I could do later, if I felt so inclined.
Of course, as adults we don't stand around cussing, but we will use a collection of letters if it fits the context of the subject at hand.