DaMoshe: Yeshivish people do not demand the MO stop having mixed seating. But do not expect Yeshivish or Chasidish friends or family to attend your weddings if it is mixed seating. They do not have to, should not and will not, compromise their “chumra” to make you happy.
And don’t expect them to eat from your house, with your cholov stam and hechsheirim they do not rely on. Or come into your neighborhood where the women are running around in short skirts and shirts. Or attend your shiurim where your rabbis preach wrongheaded hashkofos.
And the fellow who threw out the Hershey’s chocolate holds it is treif, per the psak of his posek. So he cannot give it to someone else, even if the other fellow holds otherwise. It isn’t a chumra. It is halacha, even if you disagree.