Sounds like that's a problem that could be fixed quite simply. Find out why HR is sending out so much stuff, and if there's a better way to do it or a way to eliminate it altogether. A short, once-a-day announcements e-mail should suffice, no?
This is probably because the existence of their department is not entirely justifiable and they feel the need to make others aware of their presence and create the appearance of work being done.
