Hmm, I just randomly clicked on one page there, and I honestly don't understand what's wrong with the comments, e.g.
"If this info is truly valuable for demographics, shouldn't we also be asked to describe our education, our race, our political preferences, our sexual orientation, our hair color (both carpet and drapes), and our income level?"
Maybe it's because I'm not a native speaker, but I don't see in which way this is insulting to anybody.
Maybe the "carpet and drapes" ? I don't know what that means.