About 15 years ago I was promoted to a dept manager position at Walmart. They rented out a conference room at a nearby hotel and had this whole anti union training. I really didn't think much of it at the time being as young as I was... but it was pretty much just like this poster. Telling us to report if we seen or heard any talk of organization of a union. Kind of shitty of a thing for a company to do now that I looks back on this.