My concern is the noise the damn things will make and how that will impact on the environment as a wildlands experience. Personally, I don't like being in the marsh near someone who is constantly on a duck call. When you get 2 or 3 sets (and, I would wager, even one)out in one area of the marsh using these things the noise will be absolutely rude and will, I guarantee it, totally ruin the experience for anyone who loves the marsh for what it is. It'll be worse than sitting in a closet with a smoker.