My biggest pet peeve is people who don't use their turn signal (when driving), I mean its not that hard to hit that little knob to turn it on... seriously. I've heard of all kinds of excuses on this, but frankly I don't buy a single one of them. Whenever I see it I want to send the person back to driving school. One of my friends doesn't use his signals often, so I bug him all the time when I'm riding with him.
