David writes, "The other day I received a direct message on Twitter from a colleague of mine that said, 'Is this what you were talking about?' and a link to a web page. Like a dummy, I clicked the link. It took me to some random web page that didn't have anything to do with me. I messaged him back, and he had no idea what I was talking about. Then, I started getting messages from other friends on Twitter asking what I was talking about. Somebody hacked our Twitter accounts! What can we do to fix it?"