Hello jake,
Score and money farming using zones is strictly not allowed. In this case, i don't think it is a reason to ban, as it is upto the players who are dueling each other to set the prize amount. You can accept or deny a duel request. Anyways, I'd like pistolero's input here, lets wait for him. And if he doesnt reply here within 12 hours, you'll be un-banned in-game.
Regards.