Spurious user ids deleted

With apologies, we have found it necessary to delete some user ids that were created on this web site. Many spurious user ids were created by automated bots for the purpose of posting spam, and in some cases, it was difficult to distinguish those user ids from legitimate ones. If your user id was improperly deleted, please feel free to recreate it. There is now an email confirmation process in place to help prevent spurious user ids from being created again in the future.