In a study conducted by the Psychology Department of North Carolina State University, 42 college students were asked to watch as a series of medical sites loaded. It was a trick: The researchers had rigged the computers to display typical malware popup dialogs, such as "Warning, your computer is infected with spyware. Windows needs to download and install the anti-spyware updates to remedy this issue. Click OK to begin." Just over half the test subjects clicked OK on three flagrant malware dialogs. Timing of the clicks suggests that most users simply wanted to get the popups out of the way, without considering their contents. (Image by Ars Technica)