Provided the contestants were TOLD of the fact that consumption of too much water can cause water intoxication resulting in death (as opposed to it being written on a piece of paper that no one reads but signs anyway), then I think the contestants themselves are to blame. However if the radio hosts did not disclose such an important matter, and thought that a disclaimer on a piece of paper would save them, then they should rot in prison because they probably chose not to disclose it because it would affect there "ratings" as people may not proceed with it.