Well, seems as though someone it out to get somebody. From my hisotry with forums, it usually doesn't go away for awhile. The staff may want to be on top alert for this one. With someone posing as other members on IM, I wouldn't trust anyone at the following time.
If anyone gets an IM form someone on CF I suggest you just ignore it and close the window, no point in trying to start a conversation that might not even be form the real person, plus, starting a conversation with them gives out your IP, don't jeopordize that. Stay secure, crack down on security if you can.
Although i may be new here, I'll try to lend assistence wherever and whenever possible.