May be wrong, pure speculation here. But it seems they were deep hooking those crappie. It happens, but when it does it should alert the fishermen to start setting the hook earlier to prevent them swallowing the bait. This wasn't happening and thus fish die off. The keeper crappie being thrown back was an attempt to keep larger fish, which is a complete waste of a fish. Either way, it's sad to see this happening, especially if those folks are locals, think out how many fish they have wasted.