Because as soon as you started making very valid claims about the falsity of their faith then they, or at least two of them, would start slamming the "abuse" button.
That's frustratingly PC. Why to complainers have so much clout just like in the liberal world? One athiest and down go the 10 commandments and Christmas and the bible and everything. One complainer and down goes the thread.
Well ya see, that's the thing. You can see clearly that they are in error. You can see clearly that I'm in error. I can see clearly that you're in error. And I can see clearly that they're in error. They can see clearly that we're both in error. Now if we all believe ourselves to be walking in truth then clearly expressing your opinion that others are "wrong" is fair game. But the way the lds have been treated goes way beyond disagreeing and long ago crossed into petty sniping and grudge matches...at least in my eyes.