There is definitely too much TALK about tznius in schools, shuls, forums, etc. The other issue is that all too many times the ills of the world are blamed on women not wearing tznius clothing. In today’s world when you say that to a kid, a teenager, and even an adult woman (“the reason 9-11 happened was because woman are showing too much of their collar bones, knees or elbows”) it loses it’s effectiveness. Our girls and women today are much more sophisticated than that.
I personally teach my daughter the importance of valuing herself as a PERSON and not feeling the NEED to dress in a way that exposes her too much. Girls need to learn the importance of loving themselves first, then they’ll stop trying to get the outside attention with the way they dress.
If someone is dressed in a way that is unacceptable to you and they are in a public place, you have NO RIGHT to say anything. If they are in your home you can say something in a nice way. If you do that and they still ignore you, you have an issue of respect going on.
People today are afraid to set standards and deal with them directly. When that occurs and we are not passive aggressive about it, we’ll see results. Lastly, when other people who are pointing out other people’s faults are doing so while “misbehaving” in other areas, your words are null.