I would go to the proper people, let them know and handle it. It's not worth a confrontation. I think it's utterly disgusting but let the proper people handle this issue. If it is another person who these rants were directed at, then let them know to go to the proper people within the company.
I'm with Squeamous (or Penis, as bemonikered by our new chum grimms).
That gives me an idea for a film script!