Fare-beating has long been a problem for the MTA, but transit officials say it has grown worse, and is one reason fares have to go up in March. They say fare-beating increased after the Manhattan District Attorney last year stopped prosecuting most cases, a response to concerns that black and Latino violators were being disproportionally singled out. The NYPD also has eased enforcement, issuing civil summonses to the majority of turnstile jumpers instead of arresting them, focusing instead on more serious crimes. NYPD numbers show more than 10,000 fewer arrests for fare-beating since January, compared to the same period last...