Most of the finger pointing has been at the females of the community. What about the males? If husbands would stop their wives from dressing a certain way, if fathers would not pay for clothes that was not appropriate for their daughters, if the community as a whole would not shop in stores that sold clothing that was in clear violation of halacha, then things would change. Until then….
To illustrate just how far we have sunk as a community in this regard, a clothing store on a popular thoroughfare in flatbush displayed skirts in their window, that clearly did not cover the knees of the mannequin. The cynics will say, “well mannequins are not obligated to follows the laws of tznius”. Those who choose to keep their heards out of the sand, will realice the statement the store owner is making with the window display. Yet, people happily shop in the store further encouraging the store owner. its a mindset, and it has to change.
I worked for a non jewish company that strictly enforced its dress code. Granted, their standards were well short of halacha, but they were careful to enforce the standards they did have. To this day, i have not forgotten the scene, where a manager went with a tape measure over to one employee took out a tape measure and determined that her skirt violated company policy that skirts could not be more than one inch above the knee. They sent her home to change. Everyone else, got the message and didnt push the envelope.