1) I'm in a longterm relationship, but not married so I don't wear a ring. This causes some confusion for males when they try to make an approach. I have to wonder how much more confusing it would be for them if I didn't have a ring finger at all. I can make up a wood chipper story and leave it at that.
2) People are funny about statistics. When there's a very low probability for a positive thing to happen, they like to point out that it does in fact, happen. When it's a very low probability for a negative thing, they discount it out of hand.
Example: "People win the lottery. It happens."
Example: "Sometimes people get bit by sharks and hit by lightning at the same time, but it's just not going to happen to me."
3) If I suddenly see something moving in my peripheral I may attack. Just be aware, and don't take it personally.