I do, only for times when I meet nobber people/ cyclists like the one I met last night.
Absolute hoon was sagging his head to his bottom bracket then at the road then down again and repeating this in an exhausted manner, as he came steaming past me as if to prove he was the Messiah obviously not knowing who I was.. And this 8yr old girl was crossing the road and nearly got smacked by this hoon if I hadn't shouted OI!!! And he looked up and swerved.
He then pulled over at his house no less than 509m down the road and shouted, I'm well aware of my spacial surroundings??? so I thought I'm not having this.