I've killed some birds over decoys. I use them in certain situations. I’ve hunted with mine twice in the past 2 years.
I wouldn't mind killing one while fanning either. Don't think I'd let the bird get within 15 yards of me though. I'm sure I'd miss just like a lot of the shooters on the video did if one got any closer.
To all the guys that have a problem with decoys. If you really want to call it hunting, leave the calls at home as well.
Hunt the way you want.