It is known that the Vilna Gaon put 2 sectors of Chassidus in Cherem. I am wondering who has permitted them now seeing as we non-Chassidim don't make borders between them and ourselves.
In the last decade there have been quite a few bans (cherem) on books published for the Orthodox Jew. Usually these bans are put in place by Israeli Charedi Rabbis. To my knowledge most of these bans ...