I usually try to say hello to people, but sometimes I"m not in the mood, or I'm in what is laughingly called 'the zone'. I think other people are like this too. If someone was to call me an ignorant twat for not saying hello, I might want to turn around and demand an explanation. How do you know what's going through their head, what they're thinking about and what's going on in their lives at that particular moment?
Quite. I don't get this thing about "having" to say hello to other runners. If someone smiles at me or says hello, I'll acknowledge them. But I don't go out of my way to be sociable - after all, running can be hard work!
It's just as rude to require someone to be friendly to you as it is to be unfriendly - consider the person who just wants to read on the train and is being pestered by the person next to them. Person next to them wants to chat, and finds reader rude. We are all different.
I might have entered it if the start time had been more sensible. Surrey County Council seems to insist on all events starting at the crack of dawn without appreciating that South West Trains does not run trains early enough to get to the events.