Road user hierarchy

Given that I walk around the suburb quite often with my grandmother it has come to my attention that there is a subtle hierarchy of road-users:

1. Fully-kitted cyclists on bicycles that cost enough to settle the debt of a third-world country. These people usually ride 6 abreast and wear lycra outfits more appropriate to a 70's disco dance. The boys shave their legs.They are too important to greet other road users.
2. Anonymous long-distance runners built like strips of fat-free biltong. These people wear heart monitors, wraparound sunglasses and make a point of running into the middle of the road to overtake walkers. Sometimes they raise a hand in passing but this is never accompanied by any verbal greeting.
3. Mountain bikers. They usually ride two-abreast and are more often spotted at trendy coffee bars. Sometimes they shout a hearty "Morning!" as they overtake you (as long as it's not on a rise) on their way to the coffee bar where they've parked their urban SUV's.
4. Club runners. These people aspire to be long-distance runners but have not yet learned the code of silence. They usually wear old racing shirts and you can hear them coming a mile off. They look to the alpha runner for clues about whether to greet you or not. If he/she does then they all chime in immediately.
5. The stragglers. These people have not yet cracked the run-and-talk thing, they are usually spotted about 50m behind the Club Runners (who ignore them) and they often clutch at an imaginary stitch when they spot you so that you don't judge them. They usually greet you cheerily since you're lower down the hierarchy than they are. Sometimes they throw in a hobble for extra effect.
6. The speed walkers. These people are deadly serious about "technique" and always look ridiculous. No-one greets them.
7. Club walkers. Usually slightly overweight middle-aged women. The hockey captain is the alpha female, often already showing biltong-tendencies and wearing a peak cap, fitted designer top, pink lycra leggings and a fake tan. They greet you politely then go back to their skinnering about so-and-so's husband who's left her for a pilates instructor/personal trainer.
8. Social walkers. Usually in pairs. These people wear oversize T-shirts and leggings. They greet everyone (except the power walkers) My grandmother and I fall into this category
9. Dog walkers. The friendliest by far - they stop and chat to each other and exchange dog stories while their dogs either sniff each other or growl. Dog walkers greet everyone.They wear floppy-brimmed hats and crocs.
10. The paper-delivery chap. He smiles and waves at everyone, never tries for a "personal best" and usually rides an old clapped-out bike. If someone sponsored him he could probably win all the cycling races. He stops and smokes on the side of the road sometimes. His speed training consists of escaping from snappy-jawed rotweilers.