Among these, just in the last week or so, singer Kanye West (picture), who jumps up on stage, tears the mike from MTV winner Taylor Swift, telling her she didn't deserve her award; soccer player David Beckham, who throttled a fellow player on the field for all the world to see; tennis champ Serena Williams, who expressed a desire to shove ball and racket down the throat of a judge; and Congressman Jim Wilson, who interrupted President Obama's speech on health reform to call him a liar.
Alas. The single episode of cafonaggine is a cafonata. As there are so many people like this out there, you may need synonyms, for variety: villano, buzzurro, coatto, volgarone, bifolco, contadino, zoticone...