There was a lot, but one thing that comes to mind is that my boss tried to tell our new employee that she would work her for an "unpaid trial period" for a week. When the new worker went off on break I let boss know that she legally had to pay the new worker. When the worker came back in my boss told her that surprise, she could actually get paid the hours she would work. Lol.
Other things that come to mind:
Some unscrupulous shipping practices
Being told that if I find someone in our building was having a medical emergency, I was to call building management first and not emergency services (fuck that)
Me insisting that yes, we did have to hang up the state and federal labor law posters in a visible place, and no we can't just make copies and put them in a file organizer
Me being told "don't worry about safety" after discovering half of our office was powered by surge protectors and extension cords being daisy-chained
Having to sign an email agreeing not to be paid owed overtime pay (this was during the pandemic, we were in crunch time and I was the only one that could fix the problems so I didn't really have a choice)
Other stuff too but I don't want to get too specific lol.