I have to admit, I'm with Mr. Scalzi on this one. I'm much more forgiving of fantasy than science fiction with suspension of disbelief. (I mean, the density of lava in Lord of the Rings? We're really going to quibble that Gollum sunk into lava in a moment that had much more to do with the artistic and dramatic themes Jackson had been playing with Gollum the whole trilogy?)
But even with science fiction, I can forgive a lot. Faster-than-light travel? Sure! (In fact, I dislike "hard" science fiction that goes out of its way to not have FTL. Boring!) Teleportation? Sure! Sound in space? Sure! Even there, though, there's a limit. The "red matter" and "supernova threatening the galaxy" thing in the latest Star Trek movie bothered me tremendously. IT DOESN'T WORK THAT WAY! We all have our lines.