According to "1.6 Canceling News" section of gnus info, "not many news servers respect the ‘Cancel-Lock’ header yet, but this is expected to change in the future." Does anyone know if this is still the situation or if the canlock-password is now widely used? A user can find a password inserted in their emacs init file, assuming its not already present there, or in ~/.gnus.el. It's not clear to me which newsgroups do this actively.
Best wishes, Colin Baxter.