having worked in IT for years - these stories have been doing the round for years. I'm not saying we shouldn't be carefull out there, but a lot of these e-mails doing the rounds are there to scare us. I've heard so many variations on these these themes - especially the one of someone in the back of your car!
so yes, be careful, but also treat a lot of these emails as spam!
& JP - yep - I know that yours is a real story