QotD: Bad SF/Fantasy Writing

[Responding to the question "what turns you off in SF/Fantasy reading:] Egregiously bad science. Backgrounds that don't hang together (vampirism should not be ancient, secret and prone to spreading like a virgin field plague. If starship navigators are rare and die after a dozen trips, there should not be a large population of tramp starships. Ideally, one should not equal two and the standard method of landing a spaceship should not be the crash-landing).

The number one thing that turns me off is when it becomes clear that the author considers most humans a waste of valuable meat. See Bova's Titan where it's clear most of the humans in the Saturn system have no productive value, despite being a collection of scientists annoying enough to have been sent almost 10 AU from home, or David Marusek's Mind Over Ship, which includes this little rant:

"So who needs people? People are so much dead weight. They eat up our profits. They produce nothing but pollution and social unrest. They drive us crazy with their pissing and moaning. I think we can all agree that Corporation Earth is in need of a serious downsizing . . ."

James D. Nicoll, posting to the Lois McMaster Bujold mailing list, 2009-01-17