One of the most memorable examples of not being treated like a human was when a coworker of mine wished to take one hour off in order to see his daughter graduate from high school. He had 4 kids at one time. But he lost one to cancer and two others to gang violence. He put in a time off request more than 5 months in advance so he could see his only remaining child graduate.
They denied his request. On the day of the graduation he clocked out and went to the graduation. He was gone maybe 35 minutes total. He saw his daughter walk across the stage and then he returned to work. They were waiting for him at the time clock and fired him.
When it comes to the interns, I saw a lot of yelling, grabbing by the arms while admonishing, and making them work without meals. All of the full time Korean employees had their lunch catered every day. The interns weren't allowed to eat with the full time employees and they weren't allowed to take any kind of meal breaks at all as for as I know.
I'm sure there was much more that went on behind closed doors, but seeing grown men grab 19 year old girls by their arms and shake them while yelling at them was pretty enlightening.