"From Administrator" PM Spam

The Crazy Meds Talk forum was hit by a spam bot that sent out a shitload of PMs with the title "From Administrator." The bot's name was nothing close to an admin or moderator's name, yet many people still clicked on the link that promised information regarding changes to the forum. A link to something like a porn site in the .ru domain or a disreputable 'pharmacy.'

Information regarding the spam, what we've done to prevent a repeat and how the spam-naive can repair any damage done by visiting said links is being discussed in this topic.