See my comment to the same prejudiced twit: sometimes it isn't even with the length of the skirt but just conditions.
Where I live, many young tourists like to sit on the steps of the monuments. Guess what is in plain sight to anyone in front and below them? Are we all criminals because they were too thoughtless to consider the consequences and so prudish as to consider it a crime? No.
Are all the men and women who work below the grates in sidewalks criminals? Again, no.