8. Bill Cosby - Worst Tipper - Let's face it, Bill has done way worse things, but being a bad tipper is the icing on the sh*t cake that is his life. It's ironic that this guy was the poster child for setting a good example, it's reported that on a $350 cheque, Bill left a lousy $3 tip. Guess the rest of the tip went into buying extra Rohypnol.