There are other things to do at this convention, like finding out what the next Star Wars movie is called or seeing a preview of the Firefly movie, but we wouldn't know - we're in the dealer room pretty much the whole time. Con attendees know perfectly well what dangers exist in there, such as the dangers of buying expensive bullshit with your food money, and that's why they leave it from time to time. Imagine some depraved Vegas invention which could, in a single iteration of its evil purpose, obliterate your savings and replace the real artifacts of your life with convincing replicas of the sword from Lord of the Rings. This is not some dark fantasy. This is something that can actually happen, if you lack the cunning to contend with the treacherous dealer room and its huckster denizens.
