Originally Posted by
Gwyn chan 'r Gwyll
No, Yora pretty much summed up my descriptivist outlook. "rules" are an artificial concept placed on a fluid language. If people don't know when to say "whom", and people don't it's not a part of the language.
I'd say that, at this point in history, and if not know than CERTAINLY in ten years time, you could definitely say that "whom" is an archaic word no longer used in modern English, except in such texts where archaicisms are encouraged and, yea, even prescribed. Academic texts and such-like.