in general, it makes me wonder how different most shows (or movies) from my youth would have been were there such an intraweb at the time. like, how quickly would "sixth sense" be spoiled in the era of twitter? would earlier sci-fi shows like the x-files, V (first), quantum leap, etc. excelled with the added dimension? are shows of today, like lost, geared for intranet use, casting aside such innocent victims as my parents?
You forget one very important thing, though. People don't need the internet to talk to each other. The internet heightened the conspiracies and such of Lost due to the immediacy of the technology; but people have been discussing, brainstorming their favorite shows for years. Instead of just having message boards dedicated to their favorite shows, they had fanzines and newsletters. The simple answer being that nerds will always seek each other out to discuss nerderies.