If you are banned for a certain activity then I am pretty sure no one is going to listen to you. Although if your account is locked due to some suspicious activity then there is a chance to get unlocked.

Read this guide - https://bitcointalk.org/index.php?topic=497545.0 and do all the things mentioned there to recover the account, Instead of sending it to an Admin(Theymos or Cyrus) send it to a global moderator like saltyspitoon or grue or hilariousandco asking them to unlock. hilariousandco is recommended and he is the most active Moderator of the forum.