Disabled runners looking forward to running in this weekend’s iconic Brooklyn Half say the fast-and-loose organizers are leaving them in the dust before they could even pick up their racers’ bibs. Road Runners implemented a new rule that requires blind, paralyzed and other special needs athletes to plead their case to be granted a “critical” second guide for the annual race, The Post has learned. “Why ever do you need these people with blatant disabilities to now appeal for more than one guide? It’s absolutely discouraging,” said Sonya Choudhury, who has been volunteering as an Achilles International guide for 12 years. Road Runners asked disabled athletes to apply for a second guide for this year’s Brooklyn Half Marathon. Michael Nigro for NY Post Road Runners unleashed chaos in March when it announced that it would no longer allow any disabled runners to have two guides — a blanket rule it reversed nine days later after advocates following severe backlash.…