Where I worked a while back, we had a guy who was SUPER ANGRY about the O.J. murder trial verdict. He just went on and on and on about Johnny Cochran (the lawyer who got him off) and what a bastard he was, etc, etc. Literally for hours.
After listening to his ranting for two days, I came in early the next day and set his background to a big picture of Johnny Cochran (the famous "If it doesn't fit, you must acquit" one) with the caption "My Hero." He knew who had done it and came to see me about it, although he took it well. I changed it back, but I think he got the message because the ranting stopped.