That is different normal trains are different always avoid trains that originate from Bihar, UP, West Bengal, Odisha there are too many daily labor in those trains even TTE can't do anything due to limited trains they let them occupy sleeper by collecting challan. On purpose railway allots old bogies in those lines cuz the crowd will spoil them anyway. I saw people twisting tube lights instead of turning of the switch. In other trains they don't occupy reserved seats in most cases.