First of all there is a huge difference between ragging and introduction.
Ragging is something very different from interaction. Ragging was something used to happen years ago which includes physical harassment,mental harassment and much more.Introduction includes just few verbal abuses and this helps in getting in touch with your seniors which are very helpful in long run and i hardly think there is any medical college across india where there is no ragging
Hope it helps
Animesh Jain Taraiya, First year mbbs student at kgmu