A study says bullying and victimization were pretty widespread in US schools. Researcher sent questionnaire to school that asked kids whether various things had been done to them, such as if "other students make me cry", "other students look at me in a mean way", "other students tease me", "other students ignore me on purpose". After analysing all the responses, researchers have found 89.5% of children experienced some form of victimization and 59.0% of students participated in some form of bullying.
My take on this? it has always been like this in schools from what I can remember, it just to a lesser degree, and nobody studied it before. Watching Simpsons by students in last few years only make it worse.