I am no fan of prudie and make no secret of the fact. However, some of the people criticizing her over miscellaneous random things pretty thick themselves, as well as know-it-all jerks. So the idioticy is on both sides.
What I find the most annoying about prudie is her know-it-all-ness (is that even a word, if not I don't care anyway) and her sense of infallibility. Its not even her opinions, but how she goes about it. Its ok to disagree about things, but theres a way to go about it. And prudie does it badly-- as so do some of her critics.
More to the point is how science works, which I take it most people have a poor grasp of it. Science isn't about giving us definite answers, its about a process that constantly refines itself. Human psychology is a very young science, if even science to begin with, and very poorly understood. Look, we all (well, not me, but just about everyone else) look up to shrinks / advice columnists to have all the answers; but reality is, they're almost as clueless about human psychology as you and me.
They're nothing more like ancient day prophets proclaiming to know the truth. Sure, they got it right sometimes, and wrong other times, but overall their track record was close to everyone elses. Except that prudie-- and some of her critics-- takes it a step further. They take on the same attitude the RCC takes-- "we're infallible because we say we are."
Case in point is the armchair psychologists saying that that girl has Asper's Syndrome--- something very poorly understood to begin with and they haven't even met the girl and I am also guessing they have a poor understanding of how statistics work.
But thats just MY take. I COULD be wrong.