Not everybody ignoring someone is mad at them -- I'm not angry with any of the folks that I have ignored.
Some have had avatars that drive me nuts, some babble and I don't want to see all of it (but will choose to see specific response in specific threads) and some I ignored during the original ignore thread discussion.
I like it the way it is, but if a change were to be made, I would definitely prefer to abandon the ignore feature over letting everybody know who is ignoring them -- there is no upside to that.
Actually, if we could kill the public stats for Ignorance (!), that would be even better.