According to the Mishna (Yoma 3:11), the Rabbis censured the House of Avtinas (among others) for their refusal to share the knowledge of the Maaleh Ashan.
According to the Mishna (Yoma 3:11), the Rabbis disapproved of the House of Avtinas (and similar groups) for not sharing the knowledge of the Maaleh Ashan.