Information from local forums isn't going to help OP. His account got banned and the right way of asking a pardon or finding out why is to post in Meta or contact a mod/admin. What knowledge would users of his local board have that could help him?
The main idea is whenever a ban is placed it must follows a cogent reason to back it up, i dont plagiarize and if possibly any reason could have lead to the ban then it could have been temporary ban instead of permanent ban, I cant remember precisely maybe by (theymos) on a thread i red on the forum talking about placing ban, which is in three stages, provided its not an automatic permanent ban offense. Temporary ban could include 3 days warning temporary ban, 7 days warning temporary ban before a permanent ban can be placed on such user, this is the protocol I know the forum has in place.
In this my own case, the reason for the ban remains unclear.