When I first started at my last job, I saw a department director tell a union employee to go wipe down #13. That meant the person was supposed to go to machine #13 and wipe the entire thing down with cleaning solvent. The thing was about the size of a full sized van.
Half an hour later we go down there and the guy was standing there with a rag making circular motions on the #13 printed on the side of unit #13. All he had done for half an hour was wipe that printed number, an area of about an 8" circle.
"What are you doing?"
"You told me to wipe down #13, so I'm wiping #13."
That's the kind of union BS I was raised with. Not a thing could be done about it. Soured me to the unions pretty quickly at that job. Eventually, that union voted themselves out because the company offered better benefits to non-union employees.
But, as mentioned before, today I work with a lot of union carpenters, plumbers, electricians, etc., and for the most part, they are great.