Boom, bicycles. Bicycles are a perfectly valid form of transport and since I feel there is a bit of animosity between cyclists and motorists in the US of A, I, as a Dutchman, feel obliged to do my best to spread the relative peace and harmony between motorists and cyclists here to the rest of the world.
The only way I know how is to talk about bicycles, which would in turn have people thinking about bicycles and the rest solves itself. My only foreign language is English, England is arrogant enough to state that they don't need to learn anything (http://www.bikebiz.com/news/read/mini… utter cunt), so that leaves only the USA to ramble to.
Attached to this post is a picture of the evolution of bicycles. It's not quite complete, but the point is that there are many many bicycle designs. And many of those are rubbish and have no use on the street. The important thing in assessing if the owner of a bike knows what he's doing instead of just cocking about is to keep in mind that most bicycles are only acceptable if they're used in a manner they're designed to be used.
Piloting a track cycle on the street is similar to driving a rally car on the street. Legal, fun to some, but really not something you actually want to do and people will rightfully think you're a cunt. Same goes for mountainbiking on a cycling path. A mountainbike is slow and flings whatever is lying on the road everywhere due to those knobby tires. However, people will also think you're an idiot if you drive your opafiets on a trail path.
So, if you want to ride a bike somewhere, get a bike that fits the environment. And remember, no bike can do multiple tasks. Also, vitally important is to realise that there are a few bikes that are uncool under any circumstances
-electrically assisted bikes
-folding bicycles while commuting (while practical, too clever for their own good)