I was there once. It only went on for about three or four months but the person had created something like 11 or 12 accounts that all interacted with one another and me as well.
Seems creepy at first but then I got to thinking of all the work that went into that charade.
I would be lying if I said I didn't enjoy myself, at least until some one found out and outed them.
One night they all just disappeared.