> The moment someone questions your name in a hostile fashion? Hang up and move on to the next potential mark.
Not Justin. He was happy to keep asserting his Justin-ness until I gave up, then proceeded amiably along the script, telling me that his company had been monitoring my computer and saw that I had downloaded a virus, etc, etc. I told him that I write about these issues for a living and that I had actually covered this well-known scam. This still didn't lead to a hang-up. Justin told me that was just not true and that "Windows Technical Support" was a wholly legitimate business.