A heckler who got into a heated exchange with Bristol Palin at a Southern California bar and restaurant last week has apologized for the incident. Palin had just finished riding a mechanical bull at the Saddle Ranch & Chop House when Stephen Hanks shouted, "Do you ride Levi like that? Your mother's a whore." (snip) "Having had an opportunity to view the camera footage of the incident this past Thursday ... , I have come to the conclusion that no matter what my feelings are towards Sarah Palin, I should not have expressed them towards her daughter, Bristol Palin," Hanks...