So, does anybody here think that if you were locked in a room for a week with just 5 cases of beer that you would die of dehydration because of beer's diuretic properties? In other words, does anybody think they would pea out more water than their body absorbs?

The answer is "no" for me. I'm thinking you'd find me well hydrated at the end of the week. I probably would have gotten in a couple of workouts too. A diuretic may cause you to urinate a bit more, but you also absorb a lot of the water in the beer too. Hard alcohol is something else.