We know that in practice, users have been conditioned to treat securityalerts and other caution dialogs as obstacles; they will blindly clickwhatever option makes the dialog get out of the way of whatever they'redoing, no matter what. It has recently struck me that there is an obviousreason why, and it's even something I've written about before: it's theproblem of false positives .

Unless you have really serious problems, your system is almost alwaysdoing what you want and you almost