You might be onto something with item 10 there ...
FWIW I would never ever have cycled in London without my hi vis yellow jacket - mainly because I felt that nothing says 'cyclist' quite so quickly. Given that there's a lot going on on London's streets, having something on that quickly flags you up as a bike (and hence likely to behave in certain bikey ways) made for an additional safety measure. I also thought that it would mean that if someone hit me and said 'sorry, love, I didn't see you' I could have a good laugh before expiring.
Then I moved up here (rural Dumfriesshire) where frankly there's not a whole lot going on on the roads and if anyone can't see me then they're not going to see the deer, sheep or loose cows either and they need removing from the gene pool, or at least the roads. And more to the point, it's just not frightening. Even in Dumfries, the traffic is lighter and the drivers while not exactly better seem perfectly capable of seeing bicycles. The scary yellow jacket got put away within about a month and only now gets worn when I'm cycling down to choir of an evening and I know that there will be a lot of elderly drivers on the roads, and it would be bad form to have them hit me.
Since then I've ridden in London without the yellow jacket and promptly almost got wiped out by a bus which overtook me and then forgot all about me. So I'll probably continue to wear hi vis on London's roads while continuing to campaign to make it entirely unnecessary everywhere. That said, I never wear a helmet wherever I ride so go figure. Nobody said we had to be entirely consistent and rational ...