aussie, I agree with that second part, its like at a shiur, the speaker will say to women that theres a problem in tznius and they have to correct it, its up to them and something along those lines. People who are going to a shiur, are not the ones who have the problem in tznius.
A side point on tznius: Now, with the weather the way it is this week there is a problem of women walking around with uncovered legs and in flip flops (I happen to think it looks completely ridiculous to be in completely tznius until the knee, and then “beachwear”, but,) I have heard many people (chashuv, respected people) say how terrible it is that they are walking around like that. Rather, think to yourself how good it is that at least their hair is covered, (assuming its someone married), aren’t wearing something too tight etc. No one knows what she came from and this level may be an increase in her level of tznius.