Would you even be able to bring these into Canada!? I can understand the stealth factor but I don't think you could use it during a bow only season. Cool idea but yea- why not just use a rifle?
Dumb gimmick. I see too much potential for some sad accidents with this thing.
It will never be legal in any bow season.
It would be classified as a firearm if you wanted to use it for pest control in areas firearms are not allowed.
In any area it would be legal and as has been said " Use a gun"