Thecap is correct, it seems to be an "ignore list" and even whilst I'm not a big fan of the concept of having "Foes", I do respect the prerogative of some users to "ignore" the posts of others, so this function has now been reinstated.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)