Way to miss the whole point of the story. I'll make it explicit--ignoring your audience is a bad idea. So too is simply catering to what they say they want.
I think you have to ignore the audience when writing. Ask twenty-five Star Trek fans what they really want and you'll likely come away with at least thirty answers.
You also have to ignore the fans when it comes to casting and character design. 9 times out of 10, the actors the fans want either don't want the parts, aren't available do it, and/or are just the wrong people for the job. Also, if you're dealing with a costume design from a comic book or painting/illustration, sometimes the design is either dated and needs updating or it's impractical for live-action and needs to be rethought for film. Fan desires often clash with reality and have to be discarded if you're going to get anything done.
Granted, that's not an excuse to do stuff that's genuinely destructive and damaging (the Peters-Burton-Abrams-McG-Ratner pitches for Superman Returns
instantly come to mind). But you can't rely on fannish dreams to make a movie or TV show. You can only do what's possible and practical, and if fan demands are neither, you don't have a choice. You have to disregard them out of necessity.