These all started when students union started mushrooming. That start was in the devils-own-state kerala, though beauty wise it may be gods-own-country, with the start of KSU and SFI.
SFI is the students union of CPM and KSU of congress.
Initially KSU was based on gandhianism. Eg; is the KSU inventor defence-minster AK-Antony himself. As time went ahead, KSU is a money eater and an entry point into Youth-congress. ABVP a students wing of BJP based on SFI ideals is also not backwards in violence. However SFI is the master of all violence.
SFI, is a real devil. It is the real culprit behind most nefarious attitudes in campus. They basically work on child-phsycology. Catch them in teens, brain-wash them, feed them with violence power that sets them above their friends, and mould them as CPM-killer-machines. It is these ones who later become political killers for CPM as DYFI youth wing.
Think of a teens phsycology, when he could smash the face of his class-mate or teacher or principal. This gives him, a musing of the wicket power-hunger. Any disciplinary action on the SFI cadre will death as physical bolt on the headmaster/teacher/classmate and their family from political(CPM) and SFI caders. With an year, the whole school/college will be virtually under CPM control, throughs its kids army SFI. Using these innocent brain-washed teens they control the whole educational system with no political accountability. How can kids be accountable??