While some 'nerds' certainly did (and do) get bullied, in my experience they where just as likely to get bullied by other 'nerds' as they where to get bullied by 'jocks'. You didn't get bullied because you played D&D or Warhammer or where good at math, you got bullied because you where weird and anti-social and unable to successfully navigate the unwritten social norms expected of you. Lots of people got straight A's in math and science and played Warhammer and had no problem with bullying.