Banned with only a few hours play?

Hi all
New to Nostalrius, made a Orc Shaman, character name Ridley on the non-dev pvp realm and was banned after running into Orgrimmar? Could someone explain to me why I was banned? Thanks.
New to Nostalrius, made a Orc Shaman, character name Ridley on the non-dev pvp realm and was banned after running into Orgrimmar? Could someone explain to me why I was banned? Thanks.