Really, have you? I mean, have you tried to either explain to them that it is real or tried to help them be able to have one? One of my friends, a fundementalist in their truest form, beleived that LDing was complete folly. He said that God would not allow it, that God made dreams, etc. I directed him to the thousands of people who reported their LD's. He still said they were lying. Yeah, he keep it up, until he had one for himself. :P
Also, for a project in college, I talked all about LDing. I explained dream recall, and explained MILD thuroghly. I thought WILD was kind of... wild for them. Anyways, alot of people still thank me for helping them to remember most of their dreams, and some even LD'ed.
So, have you?