A former member of the Gambino crime family, Gravano is the man who brought down John Gotti by becoming an FBI informant.

After getting busted for using performance-enhancing drugs, Canseco wrote a tell-all book that outed many of his fellow players. Nowadays every impressive feat in baseball is met with an air of suspicion, and for that you can thank Canseco.

The most famous American traitor of all-time (and a Norwich, CT native), Benedict Arnold took over command of West Point and secretly plotted to surrender it to the British army.

Deepthroat was the secret informant who told Woodward & Bernstein about Watergate. His identity remained a secret for 31 years, until he was finally revealed as FBI Associate Director Mark Felt.

Aaron Burr is famous for serving as Vice President, and for his duel with Alexander Hamilton, but Burr also plotted with the British to overtake the Louisiana Territory. Burr was eventually acquitted of treason, but he will forever be known as a snitch.

FBI agent Robert Hanssen was arrested in 2001 when it turned out he had been selling American secrets to the Russians since 1979. Hanssen's traitorous ways earned him $1.4 million in cash and diamonds from the Russians, and a life sentence from America

Former New Orleans Saints coach Mike Cerullo told the NFL about the team's now-infamous bounty program in 2011. His whistleblowing, allegedly done out of spite for the organization after they wouldn't give him a real Super Bowl ring, resulted in fines and the suspension of coach Sean Payton for the 2012 season.

You don't have to be correct to be a snitch. When he starting "revealing" famous actors and politicians as Communists during the Cold War, McCarthy became a national pariah.

The controversial Editor-in-Chief of Wikileaks revealed thousands of classified government documents to the public, making him a hero to some people and a villain to others.

Aaron Burr is famous for serving as Vice President, and for his duel with Alexander Hamilton, but Burr also plotted with the British to overtake the Louisiana Territory. Burr was eventually acquitted of treason, but he will forever be known as a snitch.

Henry Hill was a former Lucchese crime family member turned FBI informant. He's best known as the inspiration for the movie "Goodfellas."