I was at the range recently; 25 yards, individual tables with benches. A well dressed older gentleman takes the station to my right, a scout leader with a 6 or 7 members of his troop. I thought this was really cool for a professional, straight from work, to spend time teaching kids about guns. He opens a stainless case, and pulls out a gorgeous Desert Eagle .50 AE. He shows the kids how to load a mag, picks up the slide-locked pistol, pops in the loaded mag, and releases the slide. He then PUTS THE GUN ON THE TABLE, FINGER INSIDE THE TRIGGER GUARD, POINTING DIRECTLY AT ME. I jumped up from my station, and used one finger to point his gun downrange & then sat back down. He was red faced angry, and the kids chuckled. What is the worst range behavior you have had to correct?