Sorted Dave and that took a bit of time. If anyone did get deleted that shouldn't (I don't think I have) They can always re-join using a sensible name. The list looks better now with the majority being either members of watchers
They were left there as if you delete them they can just setup another account using the same email address. If you dont delete and just ban them, they cant, in theory making it more dificult for any persistant offenders.