Hundreds packed an auditorium at Central Maine Community College to voice their displeasure with Anthem Blue Cross and Blue Shield’s insurance proposal that would force individual policy holders into a network with MaineHealth providers. Under the plan, people who bought individual policies after March 2010 could no longer see doctors at Lewiston’s Central Maine Medical Center, Bridgton Hospital or Parkview Adventist Medical Center in Brunswick. They say the plan would force them to drive farther for care, jeopardize established patient-doctor relationships and reduce choice. Anthem officials say the plan will expand access to affordable health care. One of the speakers Thursday was writer Stephen King’s daughter. The Rev. Naomi King reminded people that local hospitals treated her father when he was critically injured when struck by a car in 1999.