When teams lose fans get angry and coaches get fired. Twitter now allows us to get an instant picture of fan anger. Over the first week and day of the college football season, two coaches have emerged as mostly likely to be run out of town. According to Topsy, Mack Brown has been the subject of the most negative tweets (2,550) but Lane Kiffen has the highest rate of negative to positive tweets (2 times as many negative as positive tweets).
USC fans are angrier but Texas fans are more involved.