Sledging

There comes a point when sledging can go too far. For those unfamiliar with the art of "sledging" it is a term used to describe the abuse that fielding cricketers give to batsmen to put them off their game. "We've all slept with your mother, and she wasn't up to much" being the sort of thing that gets said.
Shane Warne, the great Australian bowler was repeatedly telling England fringe player Paul Collingwood that he was an embarrasment for getting an MBE from the Queen for playing one game against Australia last summer. This is a fair point and was proven to be true when Collingwood flopped again.
Where it becomes unnacceptable is when Saddam Hussein gets sledged shortly before being executed. If you are going to kill somebody, the least you can do is show some respect for them, otherwise it just isn't cricket.