Then by all means go right ahead and harass them. Report back to this thread the results.
Do you have the nerve?
Fortunately I don't see it very often, because most women have a sense of modesty and aren't exibitionists. As for 'harassing' them, I have spoken to them in the past, (before it became legal in my state), as crudely as they themselves were behaving. I said that what they were doing was very undignified and offensive to people. I don't consider that to be 'harrassment' though, just the rational comments of a man with a sliver of modesty.
As for what the results were, they just look at you and sneer. One woman told me if I don't like it then don't look. Even though the whole purpose of it is to make people look at them.