Interesting Social Engineering Tactic

Social Engineering, the USB Way describes an interesting social engineering tactic - leaving trojan-laced USB drives is easy to find places. The trojan would auto-run when plugged in to the computer, and "would collect passwords, logins and machine-specific information from the user’s computer, and then email the findings back". The article describes this type of thing taking place at a credit union, but I would think the results would be similar almost anywhere.