If you have trouble convincing someone of this, I wrote a little helper application you can install on their computer. It pops up a focus-stealing "WARNING: Are you sure? [Ok] [Cancel]" dialog at random every 10-40 minutes, irrespective of what they are doing at that time. A day of that, and they should get the point. Executable and source download at the bottom of the rant: http://www.expert-overflow.com/areyousure/