Lost Hath No Fury
David Fury, perhaps the best writer on the staff of Lost (he wrote the Emmy-nominated "Walkabout"), has left. Reports claim he's saying the producers are making it up as they go along. While I'm sure this is an exaggeration, I'm also sure there's a lot of give in the show, particularly since they don't know how long it'll run.
I think most Lost viewers are patient. Nevertheless, if they ever suspect there's no controlling vision, and they're just being jerked around, they will abandon the show in droves.