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
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)