I don't think it's a good idea to point a 12 gauge shotgun at someone you don't want to kill or seriously injure. There's a reason that police department ones used for less-lethal munitions have orange furniture and aren't used for anything but less-lethal munitions.It's called "less-lethal" these days rather than "less-than-lethal" for a reason, you know. It's eminently possible to kill or maim someone at close range with an unlucky shot, even with "less-lethal" ammunition. And if you do kill or maim somebody with it, the very fact that you used a beanbag or baton round is prima facie evidence that you didn't think the guy was enough of a threat to shoot him with real bullets. This will not look good to a jury.
Like the old "Just shoot 'em in the leg!" thing, this is another example of the fool notion that it's somehow okay to shoot people just a little bit.