and maintainer of:
When I am running and I meet people who are out walking or especially running I tend to greet them with either a nod or a "hello". Not many repond and not many greet me before I have the chance to do so.
I have always liked the culture of sailors, no matter nationality or boat size or type - sailers wave and greet each other when they meet at sea or in harbour.
I would love for this phenomenon to be adopted in running circles, so I will continue my greetings to my fellow runners, whether they remain unresponsive or not.