I think I've expressed my point of view for the most part. However, I want to be clear.
I don't think it's fair that just because 2 members are having a disagreement to punish one of the people by effectively limiting their right to participate in threads. I don't think people should be prevented from posting in the ignorers thread, simply because they pissed off the ignorer in another thread and the ignorer decided to make use of the "ignore" option. I don't know how many times I've seen people PMS'ing one night and saying something they probably shouldn't have...only to apologize later for it. So, a one time sledgehammer fix is not the answer in this case. Although I do tend to be a fan of sledgehammers...tends to make whack a mole more interesting.
Please note it's called "ignore" not "banish". Hence why I say to mark posts by the "ignored" as hidden. That way the ignorer doesn't have to read the post unless they want to, and everyone else can read at their own peril.
mnstrgrl: good to know that someone reads those
Angelicknight: Yep, Cake==ignore PITA user, eating it too==ignored user post is hidden, so they are effectively ignored to those that want them to be.