Here is what I referred to:
Sukkah 34: Shmuel threatens sellers of hadasim that he will publicize his opinion on less hidurim hadasim
Pesachim 30 – similarly, he’ll allow less mehadrin pots on Pesach
re: M’A R Krochmal (Bach’s student, about time of M’A) actually approved Nicholsburg community ordinance boycotting shabbos fish. From a secondary source, it is not clear whether he was enthusiastic or so-so about this.