Reason #6: Violence.
In this latest headline making example we have a 44y/old woman driving her already suspended daughter to the school so she could fight another girl. From the article "At one point, the melee involved all four girls, both mothers and a teacher, according to police." That would be a total of 7, including two unnamed 13 y/old girls whose mothers did not participate.
I dont know if I would have attempted to break that fight up or filmed it to get my 15 minutes of youtube fame.