Anthony Sampson, 19, punched his girlfriend's father in the head after the ITV show - which revels in the sort of personal confrontations pioneered in America by Jerry Springer - revealed DNA tests which showed he was not the father of a baby he thought was his own. They briefly gave Springer a show on Britain's Channel Five but it was a bit watered down.
To be fair though, it is usually the Maury show which does the "Who's the Father?" DNA stunts.