I worked with a guy that started out as a ME for a specialty pump manufacturer. He said they’d plaster labels all over their ceramic lined pumps (abrasive slurries, etc.) about opening the pump to verify pump-motor-electrical polarity, and people would still end up turning on the newly installed pump, running it backwards, breaking the impeller to bits while it unscrewed in its housing.
That’s not good. Where was this? Sounds like folks didn’t know how to read.