The opening statement is spot on. They spend thirty days training you, and thirty years trying to fire you. UPS is the only company where the day you are hired, they begin to build a case to try to fire you.
Always do the right thing. There’s two roads you can take as a FTer at UPS. Show up every day with a tube of Vaseline in your pocket, and you will be given a little more leeway. Or stand up for yourself, but don’t do anything stupid. Do the right thing, every single day.