Not necessarily more discreet, but when you're rowing the balance of the boat is messed up if someone is trying to squat over the side and hit the water--the squatter is in danger of falling in and everyone else has to lean the other direction to keep the boat balanced. OK, so I guess it WOULD be more discreet to use something like this since you wouldn't have to have four or eight people leaning one way while someone perches on the edge to pee!

Sarah