That is a fabulous article!
And it takes over an hour for anyone to respond? Hmmm......
One of the things I do at a range is try to get the most far right hand positions because of what the article calls the "side racker." Can't begin to tell you how many barrels of loaded guns have been pointed at me by "side rackers." Even more egregious is the "back racker," which is a side racker who continues on to 180 degrees to point the gun everyone behind the line, too.
Folks, strongly suggest we read and re-read this article and take it all to heart.