Pm..another thing that u need to know is that its not really easy for people to know who actually follows the caste system to degrade somebody else,unless they do it openly..and as you have seen those cases more often than not get reported(in the media,etc)..bcos unlike how racism was practiced in the USA,nothing is really out in the open..its not like somebody who goes to eat in a restaurant can demand that a certain person who he considers lower than him by caste be thrown out or not allowed to enter there..Its true that there are some rural ares where the rules are still from another age,but in towns,villages ,cities everybody is more involved in their work/life and not on the look out for somebody who's practicisng casteism..