How do I explain this to my daughters?

Here's a fantastic (if long) comment from Metafilter about personal safety and the experience of being a woman. What do I know, but it feels very real. The question is, how do I prepare my pre-teen daughters to handle all of this, to remain safe without living in fear?

Schrodinger's Rapist

Get past the shocking title, because this essay is a great reminder for guys on what a woman is thinking when you approach her, as a stranger, in public. Curious what you think, Olga.

My only quibble is when she says (to guys): "Is preventing violent assault or murder part of your daily routine, rather than merely something you do when you venture into war zones? " She's assuming the answer is no, but she's wrong, especially for younger guys.

In the same way that it's hard for men to realize how much women (need to) worry about sexual attack, I think many women don't realize how much guys (esp. 18-30) are at risk of physical violence in day to day life. For no other reason than, some guy is trying to show how how tough he is. The recent beating death of that guy in Chicago was a wakeup call, but really not that surprising to me. It just happened to be videotaped.