gavra_at_work,
OK. Why must a woman keep what you call “Tznius” in an MO community where she dresses to the standards of her community? And what sort of “sin” is she committing?
When lilmod ulelamaid asserted that some “MO” women do not follow all of the halachos of tznius, lesschumras could have responded as you did, “how so?” But he instead essentially responded, “well some people in YOUR camp commit theft! How ’bout that??” That’s a false equivalence, because everybody agrees that a thief is doing the wrong thing (even the thief, because he hides his actions from public view), but the dress code is in debate, with some thinking it is wrong, and others not.