So the customer was indeed an idiot. Copy all. And I'm sure they were scrambling to limit their liablity or keep the barn owner from suing the pants off 'em. Every gun owner's worst nightmare, short of accidental blood on the floor. And I know I'm preaching to the choir here.
That said, it still flat-out bothers me when fellow firearms enthusiasts dog on assault rifles. As if they're something "you don't need." As if everyone should limit themselves to a nice Remington bolt-action and a Mossberg 12 gauge. There are people who are afraid of all of the above. We as a shooting community have to stick together for our sport. Otherwise, they'll just get more laws passed to harass you in your attempts to buy, own, or operate a gun, regulate ranges for "environmental considerations," etc.
I don't care if Elmer Fudd chooses not to buy military-style arms. Heck, he doesn't even have to like them. But he'd damn well better stand together with me and everyone else to protect OUR right to bear the arms we choose. If my AK or AR is an evil "assault weapon," guess what? Your nice Remington 700 with the fancy scope, bipod and custom trigger job is a "high-powered sniper rifle" with a "hair trigger," too.