There appears to be a point, a certain distance form the Adelaide Metro Area, where approaching drivers lift their index finger as you pass them, I assume to acknowledge the fact that you have gone bush. I usually begin to experience this phenomenon somewhere around Warooka down the Yorke Peninsular.
Not all drivers do it though, so sometimes I take the initiative and finger them first, but if they don't finger me back I feel aggrieved. Conversely, if I get fingered, and I don't respond in time, I feel bad.
So this begs the question; Do you wait to be fingered before you finger them, or do you finger them first hoping that they finger you back ?
What's the correct protocol here ?