I believe that was the area that was permanently closed several years ago, due to a bullet hitting a Ranger's vehicle that came from over the hill. I remember reading about it in the Denver Post. I never shot at that location, but many times where the video shows.
I actually went to Lefthad the first time I shot a gun. And it was one of my first times in the mountains. There were shotgun shells everywhere. So much junk. It made me think of some crappy village in China where garbage gets dumped. It was a spiritual experience and I've been hooked ever since.
Don't ever change Lefty, you're perfect the way you are!