The last two weekends I went to a state park rifle range to shoot some test loads and sight-in my deer rifles. While shooting the test loads, I stepped away from the bench to let the barrel cool and stood behind the other shooters. There is a sign posted in front of the benches that says all firearms must be pointed down range at all times. A man was sighting in his slug gun and was having trouble with some sandbags. I watched him pump a round into the gun and start aiming down range. All of a sudden he pulls the slug gun off the bags and starts pounding one of the bags. With his finger still on the trigger, he sweeps the benches to his left and then points the gun directly behind him and straight at me! I shouted "Don't point that gun at me!" He put the gun back on the sand bags and mumbled an apology and went back to shooting. Later the same day, a cease fire was called to change targets. Again, a sign says that during a cease fire all guns are to be unloaded and left on the bench and no one is to handle ammo or touch the firearms. I was watching people change targets down range and just happened to look to my left and saw a man standing there with a rifle pointed opposite of downrange and into the parking lot behind the range. I told him to put the rifle down and pointed to the sign. He looked at the sign and then at me and said: "It's pointed in a safe direction." I looked toward the range officer's trailer and he put the rifle down. The next weekend I was sighting in the best loads I had tested the weekend before and man set up next to me. Seemed like a nice guy. We exchanged pleasantries. He started shooting and the rounds were all over the backstop. I looked through my spotting scope and saw he had hit my targets. I and some of the others complained to him about his shooting our targets and he laughed and said he just put the gun together and had not put sights on it. He just wanted to see if it would function. He put the gun away. Someone must have complained to the range officer because he confronted the man and told him not to shoot firearms on the range without sights because that is the leading cause of rounds going over the backstop. The guy looks at me for awhile and gets an AR out and starts shooting. He watches where his cases are ejecting and then positions himself so that the ejected cases hit me. Every time I started to fire, he picked up the AR and started shooting and showering me with cases. I just packed up and left. It's getting bad out there.