About a month ago, I received an e-mail from a close girlfriend. When I clicked on it, there was a message directing me to click on a link to receive a great discount on my next purchase of Viagra. Since I could not imagine why my girlfriend would be promoting the sale of Viagra (or why she would think I would be a good prospect for this product), I concluded correctly that her e-mail account had been hacked and quickly deleted the message.A few weeks later she sent all of her contacts an apology via e-mail. Whether she …