Although in America, taxi drivers often have a Funny Foreigner stereotype, it's quite different (in a sense, the antithesis) in England. Often ex-police, the drivers of black cabs (or to be technical, Hackney Carriages) are known for falling into the second type of Political Correctness Gone Mad and liking to share with their customers their views on what's wrong with society today (immigrants, the youth, etc.) and their proposed solutions (public hangings and floggings). Not to be confused with black people who drive cabs, toward whom this character might not be congenial.