I as a project manager and tech implemented a solution in parallel to an old system. I had a pilot group who approved, but that group wasn't selected by me. It didn't include anyone important or basically anyone who cared.
The 'powers that be' said go forward and when the doctors were told about the new system them walked off the job. Literally all of them. I wasnt the one who picked the software, I just installed it. Still made me feel very small. I learnt years later that whole software package was never used and the doctors walked out again to demonstrate against 'the old software they have to deal with'
I basically learnt we were just an excuse to take a break.
My experience with teachers was a different one. I implemented a new 5ghz N aironet with controller for 1 school. Didnt inform anyone because the actual connectivity mechanism wasnt going to change. Teachers all walked out because... wifi causes cancer. Mind you, its not like I really introduced anything particularly new.
Police was more old school, it was more along the lines of 'we arent techsavvy enough to use that'. But this was only so many years ago, it wasnt really appropriate anymore.