Disturbing news out of Chicago today: Drunken Cubs fans acted like drunken Cubs fans. That wasn't good news for the lone White Sox backer in the group:

McHenry County authorities say three Chicago Cubs fans face felony battery charges after allegedly beating a Chicago White Sox fan so badly he lost his right eye.

The men are accused of beating 32-year-old Robert Steele of Gurnee during a 2-year-old girl's Sesame Street-themed birthday party.

Police said Monday the men were drinking alcohol at the July 19th party and taunting Steele.

This is just the latest in a growing trend of rivalry violence. In May, a Yankee-loving woman drove her car into and killed a Red Sox fan after an argument -- which consisted of creative chants like "Yankees suck!" -- (shockingly) in a bar. Then earlier this month, a group of Red Sox fans beat a man with a baseball bat, figuring his New York license plates meant he was a Yankees fan. He wasn't, and they weren't even drunk.

So what does this all mean? People shouldn't get plastered when they are with a rival.