They need jobs
There is nowadays a big hue and cry regarding students' involvement in extortion and mugging. Many write-ups of distinguished personalities of the country are being published in the newspapers on this subject.
Students are very much prone to these kinds of illegal activities as they have no future. They come to the big educational institutions of the big cities for higher education with the hope of getting a suitable job that will bring smile to their parents' faces.
Soon after taking admission in all these so called highly reputed institutions they find the dissonance between their expectations and reality.