Not to people who read HN, certainly, but just judging from behavior, it's something that's totally lost on a lot of people (even people who ought to know bette

Not to people who read HN, certainly, but just judging from behavior, it's something that's totally lost on a lot of people (even people who ought to know better). There's a weird assumption of nonexistent privacy when people use their computers; a fair number of users seem not to grasp that using the Internet at Starbucks (or at a hotel, or in an airport) is very different and much less secure than using it at home. Trespassing into an apartment building seemed a bit gratuitous and creepy, though, and might distract from the lesson (by making people think they can really improve their security by being on the lookout for nerds tailgating them in the door). I think the point could have been made just as well by sitting in a coffee shop, or checking into a hotel with free Internet access for an evening.