I find it comical the number of posts from riders who feel slighted by those who would dare to draft off them.
Is it because they don't know that a trailing rider actually improves the aerodynamics of the leader? Or is it that they are self conscious of how their @$$es (thanks UrbanKnight) look from behind?
Either way, while I generally frown upon people who yell at strangers, I also like to take an interest in the welfare of those around me.
As George Costanza so eloquently put it, "You know we're living... IN A SOCIETY!"