>professor here recently made the mistake of mailing out
>his grade sheet for a graduate course to his course's
>Listserv list.

Sounds like someone possibly unprepared for the
complexities of the modern world, computers, e-mail
and all.

Can you revoke his LISTSERV permit, or his e-mail
privileges, for his own protection?

I mean, he may send out some sensitive stuff, next.