Everyone has their pet hates and one of mine is people who block the road while they reverse into a parking space where the norm is to park forward. I used to think I was being irrational about this – after all, what does it matter whether people drive in and reverse out or reverse in and drive out. Today, I suddenly realised the asymmetry. If you reverse out, you have to give way to the traffic using the road. If you reverse in, you’re already on the road and through traffic has no option but to give way to you. So people who reverse in are in the same position as queuejumpers – violating a social norm for their own convenience.