Things could get pretty ugly for public transit riders in the Bay Area. BART’s Board of Directors on Thursday approved what officials have called the “worst-case scenario” budget plan for the transit agency. The scenario involves closing up to 15 stations, reducing service and laying off about 12-hundred employees. Officials warn that scenario will have to go into effect if BART can’t secure additional funding to help close its 350-million to 400-million-dollar budget deficit…