Eesh. See what happens when they let guys who don't know what they're doing work these games!
I would be very tempted to file a report on your friend #4 to his school's AD, your supervisor, NJCAA, police, anyone else who would listen. (I would have been tempted to turn around & tell him to put up or shut up when he met me outside, but that's why you're a better man than I.)
My first juco this season I worked with a guy who is just plain huge. Built like an offensive lineman, obvious weight lifter, great shape, corrections officer. At one point he had to tell a coach to sit down & shut up. The coach, about 100 lbs lighter, said he would kick his @ss after the game. I just laughed when he told me about it later.