I recently bought a lot of 1000 .38 special casings, and found some interesting things:
Severely flattened primers:
Pictured is a .357 case (i got about 50 mixed in with the .38s ), but the same was seen in at least 50 .38 cases..
Primers seated backwards:
and even a live round (!!)
People never cease to amaze me with the stupid things they do...