Over the weekend players have had some bad luck with guild halls, which appear to be randomly shutting themselves down and making characters camped inside of them inaccessible. The dev team has brought halls back up several times but this is only a temporary fix. It will hopefully be addressed in the next hotfix, slated for Tuesday, August 30th.

In the meantime, if you have any characters stuck in a guild hall, submit a petition under the stuck player category. This can be done via the /petition command in-game or through the SOE support web site (click "View my service history" on the right). The GMs have been moving players out all weekend with an amazing response rate. After your characters are moved out of guild hall do not attempt to re-enter it until a fix is in.