The stupidity of some people is simply mind boggling. He is lucky he was not blinded or worse.
When I reload I start with virgin Remington cases. Since I have both an A2 and M4, I designate which cases go with each rifle. I take a Dremel and make a small notch in the rim of the cases for the M4 so they are easily distinguished from the A2 cases when I pull them out of the brass tumbler. And when reloading all I resize is the neck. After about 4-5 reloads I check the OAL and trim it if necessary.