MARLBORO - A teen boy at Marlboro High School is being disciplined for using the district's email system to send "an offensive graphic" to more than 2,000 students and staff, Marlboro superintendent Michael Brooks said Monday.He explained that the short but hateful message was accompanied by a swastika, an image associated with anti-semitism.It was sent out early Friday morning."I received a call at 7:30 a.m.