'I think is likely to cause some confusion on the offense, kind of like the first time someone ran the Duck. Maybe it would even trick the QB into doing a quick kick.'
I'm trying to imagine some poor confused QB who looks at the defense and sees a punt return formation, panics and decides at the last minute to just punt it away in desperation. Then telling his coach afterwords 'I saw punt return formation and just froze, I didn't know what to do...'.