Looks like people will get banned:
Update: We are identifying the accounts that have utilized the AH exploit and will be taking action against said accounts.
We are also still investigating the severity of the issue and its impact on the game, and from this information we will take corrective action.
Estimated downtime is at least two more hours. We’ll have more updates for you soon. Thanks for your support and patience as we continue smoothing things out during Open Beta!