Community norms is a social construct not an halachic
concept (except when there is a singular community appointed Rav and Beis Din which hasnt happened in a long time). The only obligation one has from an Halachic perspective is to the one Rav that they have decided for themselves to follow regardless of what people do around him.
Do the admins of this site expect that all people who ask kashrut ingredients questions follow Rav Abadi on all other matters of halacha? Unless someone lives in Lakewood or has purchased Ohr Yitzchak (and has the skills to learn it on their own) that seems quite difficult.