CA:
1. Giving tochacha is a halachic obligation.
2. In any event, we’re not even talking about giving tochacha to individuals; here we’re talking about crying out against a widespread public trampling of halacha, that’s not only an individual aveira but rather an aveira that the meizid baalas aveiras causes masses of otherwise non-sinners to become sinners b’shogeg (at the least). Among many other aveiras here we’re dealing with machshil es horabim, לפני עור, etc.
Since its a Mitzvah from the Torah to give tochacha for people not dressing tzniut in the 5 towns, I guess its OK to give Tochacha for communities that have tax evaders child molestors , People stealing government benefits like Medicaid or section 8