At first, it was just the other account made way too many stupid arguments, but it soon escalated to threats of physical violence. I had to keep a close watch on myself to keep me from slashing my own tires. (I tried hiding, but I quickly learned that I knew where I lived and where I liked to hide.)
After two or three "unfortunate incidents" I decided to close all but one of the accounts. Things settled down for a while, but I still have to keep a close eye on me in case I go back and login to one of the "closed" accounts.
Only two of my personalities have delusions, but one of them is paranoid and the other is out to get him.