As BikeSnobNYC so astutely points out, proper style is essential to the cycling life. From Cyclocross (high fashion) to Freeride (dirtbag) to Fred (no style) and all points in between, each cycling niche forms a style unique to the group. Every tribe sizes up new riders based on how well the his "type" matches the group; baggy-shorts-and-flat-pedals are rejected from a matching-lycra-kits ride just as predictably as an incompatible organ transplant. The unwritten rules - adopting the style to the ride - are core to the culture and subcultures that make the cycling life diverse, dynamic, and a playground for creativity and self expression.
Just as style may divide, so do ties bind. Eat before you are hungry. Drink before you are thirsty. Keep the rubber side down. Knee warmers below 60. Universal principles of belief and behavior neccessary to unite the tribes as one bicycle nation. And too often recently, I've born witness to acts of abhorrant behavior flying directly in the face of good sense, good style, and basic human decency.
As decreed in the One True Way: "Thou shalt not wear ankle socks."
Unless you are a cheerleader, say no to ankle socks. Seriously. In fact no socks are preferred to ankle socks. 2" cuff, 3" cuff, 4" cuff, 6" cuff, crew socks, knee highs - everything goes. But no ankle socks. In fact, I'm extending this rule to everyone who is even semi-athletic (and generously including golfers as quasi-active.) If you own ankle socks, repent now, admit your mistakes, burn them, make a paste with the ashes, rub the paste on your ankles (where the tan line SHOULD be) and beg forgiveness from the universe for not less than 60 days. When you have a proper tan line and feel genuine scorn for ankle-sock-wearing heathens, you have my forgiveness.
Just say no to ankle socks.