You can see LEGS when a woman wears slacks!
In Victorian times they used to cover the legs of grand pianos since they were too suggestive of legs. And "legs" was too suggestive of a word, "limbs" was used in polite society.

What are you going to do if you have really nice cheekbones? Forever live your life behind a covering? One man might "fall" because of legs, the other because of wrists or the nape of a neck, and so on....
What bothered me about the original post was that it seemed to suggest that thinking like a suspicious, judgmental gossip was somehow virtuous. "This girl must be competing with her sisters in Christ, That girl obviously wants old men to look at her as sexual prey, ...." I once worked with a very devout Evangelical African American woman who was pregnant with her first child. She was really emotionally stressed out when she put on weight during her pregnancy (as all women do) and could not wear her wedding ring out in public because it did not fit. Why did she have to deal with this stress? Because she was so worried about what people would think if they saw her, a pregnant black woman, out in public without a wedding ring. She was so afraid of being judged by a hurtful stereotype by all of those "virtuous" people who didn't know how devout she was nor that her husband was studying to be a pastor. Sometimes virtuous people aren't all that virtuous.
Instead of judging the girls that were displayed in the OP, perhaps the thinking should have gone something like:
Gee, that girl might be really worried about passing her Chemistry test. Perhaps she wants to be a nurse and is worried about finding the funds for her education. That girl there might have a grandmother with dementia and is here to pray for her, This other girl might have unemployed parents and a brother in Afghanistan, Thank God she is here to find some peace, and that girl over there, perhaps this is her first time in an Orthodox church, she is is in foster care and needs to find a safe place. God help them all.