I agree. I have about quit taking decoys to a public shoot, I use them a lot more if I'm hunting by myself up in the cow pasture or something.Honestly, I've about given up on mojo's on a crowded field. Two things happen. First, every single person has a flock of them out and I believe it flairs more birds than in brings in. Second, it can lead to a lot of low birds.
They can be great on a very open field where you need to try to bring them closer. I like them about a good shot out.