What's the point of judging a girl by her clothes anyway?
To change her mind and get her to change her clothes? The idea that you should run around and say 'it has to come to this line and this line only' in order to be modest is such a legalistic approach and misses the whole point of the discussion about modesty. Since when do people – especially young people – respond well to being confined to a set of rules? It doesn't work. No one wants to obey the ten commandments if they don't have a relationship with God. And no one will listen to someone who only wants to tell them what they're suggesting with how many inches of leg they're showing. There's something more going on.
Fulfilled, happy people don't post suggestive photos of themselves on Facebook.