GuilderlandThey have been pouring in for the past week, more than 150 emails and phone calls, dispatches from the heroin front.The harrowing missives came from devastated mothers and fathers whose children died of heroin overdoses or lost everything to the addiction.Their anguish was a reminder that the scourge of heroin reaches far deeper than perhaps anyone had imagined."You're telling my story," wrote one mother, whose daughter became addicted to heroin at 15.