Names and faces to bikes

I live in London and have noticed, as I ride through the city on my geared racer of on my motorcycle, the large number of saddo fashion followers riding fixed gear or single speed fashion statement pseudo-track bikes.
I usually shout 'Get some gears you twat' or 'They make gears for bikes nowadays you know'.
Has it not occurred to any of these people that frequently pedalling at the wrong cadence, using excessive pedal pressure and generally straining in thew wrong gear, does serious knee joint, tendon, ligament, cartilage and muscle damage?
I think in a few years we shall see a significant rise in strain injuries leading to damaged joints, early onset arthritis etc.
Yours
a doctor etc

not a very good doctor are you?
ahh well.
some point I'm sure it'll catch you up, I'm guessing you're one of those guys who got their degree off of the internet?

sorry must not feed the troll.

agleopar- that is fucking sick.
nice one!