Thing is.. very few people go into random restaurants and login (and I mean, login, in which you type in your password) to sites like Hacker News or Slashdot ev

Thing is.. very few people go into random restaurants and login (and I mean, login, in which you type in your password) to sites like Hacker News or Slashdot every day. The chance of you opening a public AP in a crowded place and getting back a Hacker News password is slim to none - I'm not saying it's safe though. Foursquare passwords, on the other hand, is something you can very easily intercept in the open - due to the way it's used, and that it sends your passwords out every time you open it without you typing anything - that's already unusual. There're surely a lot more poorly secured sites and mobile apps, but something like Foursquare's authentication scheme is a big problem for its users.