Indian railway should give an option of automatic cancellation of RAC tickets. i.e. while booking ticket i should be given an option whether i want to travel with RAC ticket or not. The reason i say this is because IR takes full fare from RAC ticket holders and provide them with only sitting accommodation. I experienced this uncomfortable situation while travelling in two consecutive nights in two different trains with RAC tickets. The side lower berths are already too small to sleep for a 6 feet tall person. How can two Tall people adjust in that berth for the entire night's journey.