Ever wonder how you could maximally harass a Mac user with a minimal amount of effort? If that person is an iChat user, it’s really quite simple: Just add that person’s iChat ID to the Buddy List of a Mac in an Apple Retail Store. You’ve just doomed them to a grim future of fielding countless requests for AV conferences from Apple Store customers sampling iChat and the built-in iSight cameras that come with new Intel-based Macs. Not that I’m bitter about this or anything. Yes, I fell victim to just such a prank/unintentional mistake/colossal irritation when, a few weeks...