I have noticed some folks are able to post with the" A Yahoo user" as there ID . This makes it impossible to put them on ignore.
Please disable all who post with the "A YAHOO USER" ID. I don't know how they got it but it makes them un ignorable.
We have investigated and fixed the problem.
Y! Product Support
love this suggestion. There are so many of them, and some are interesting, some are so in need of ignoring.