For sure, other than that I've pretty much only had good experiences meeting other hunters in the field. I think the limited spots and logistics, makes tempers flare... although it does make me curious about what it's like to hunt public lands in Arkansas or Mississippi for ducks.
You should check out the Utah duckhunters page. They make it sound like hunting the GSL is akin to a nascar race.
Ducks, like elk, make people do stupid things, apparently.