It's a long story. He does not technically work here anymore, but he thinks we owe him some sort of preferential treatment. It started when he sent me about six or seven emails, asking me to print them, one of which had an 80 page attachment. I said no, and he got his knickers twisted in a "DO YOU KNOW WHO I AM!?" sort of way, and that was the end of it. He tries to sneak personal mail into the departmental mail, he stole our photocopier code so he could do his personal business with departmental funds, and if it were anyone else I wouldn't give a shit, but he's an arsehole.
At Christmas he made a huge show of giving everyone a Christmas card but me, it's that sort of a feud now.