Disclaimer: Non native, bad formating.
Some 14 years ago I was working my first job out of highschool, I was working as a phone operator over summer for social services.
At the time I was happy for the job but I also felt somewhat guilty for getting it as my bosses boss boss boss just so happened to be my mother. It wasn't mentioned in the interview but I could clearly tell the person interviewing me knew as she was rather advertising herself and her department than actually interviewing me. This lead to me going in with a determination to not only prove myself but to excell at what I was doing.
Turns out that it's quite difficult to get hold of just anyone at the social services during summer break (Sweden more or less shuts down during summer). As it happens I was still living with my mother at the time and while eating dinner together I complained about the difficulty of getting hold of the correct people. It frequently happened that people didn't sign out their phones or redirect them properly and therefore people seeking help didn't get their issues resolved and in some cases did not have money for food and the like. At this point my mother told me that if I was unable to get hold of someone in a department I should just forward them to the person above them.
I'm sure you can see where this is going!

The phone operator has the power to forward calls even when people are checked out for holiday! I figured that since my mother was the top dog I would just forward the calls to her if I was unable to help people get their issues resolved. Turns out that my mother doesn't much enjoy working on her holidays and really didn't enjoy the reason for her having to work was that people didn't pick up their phones when they were supposed to.
This lovely piece of malicious compliance lasted for a whole two days!
Turns out that people get a lot better at picking up their phones when they either pick it up or get hunted down by the top boss who's currently on holiday.
Two days later a very serious looking delegation (seven people in suits) showed up at my tiny telephone operator office with lists of who would be avaiable what hours of the day and who was a backup for who in case the line was full or the first one for some reason failed to pick up.
Turns out people get a lot better at their jobs when they realize that their bosses son is the one watching them, talking to all their clients and gossiping with the top boss over dinner.

When I spoke with my mother after the fact it turned out that she did not expect me to start using her as the backup drain for all the calls that couldn't be connected properly. Also turns out she enjoys her time off and after the calls I forwarded to her she would call the person who the call should have gone to herself and ask why things weren't working as intended. Seems that piece of news spread like wildfire.