It has a ton to do with where you hunt. If you hunt close to where the DNR is banding them, then you are likely to kill them, particularly in the north. Consider Jeff Foiles and all his guys who run around with their lanyards that are covered in bands. Well, these guys hunt in close proximity to banding sites.

I have never killed a banded duck - ever. And it is a rare thing when anyone I hunt with kills them either. Therefore, I believe it has a lot to do with where you are.