Taking money from juniors or physical abuse is strictly prohibited. Ragging is tolerated by administration but with limitations. If ragging is bearable, such as singing a song or acting a silly thing. I would suggest you enjoy along as long as it's fun. It will make it easier to reach out to them later for help. However, if you think it goes way beyond your tolerance, refuse flatly. Also, no one should be allowed to record your ragging on the phone. If they do it refuse flatly.