TKND: It might be different nowadays because the whole world has been mixed up and a Mara D’asra might no longer exist as a concept, but yes. It is Yuhara to be Machmir in an ostentatious public way against Minhag/P’sak Hamakom and it is Assur to be Meikel in public against Minhag/P’sak Hamakom.
