Worst case I ever saw ...
We had a high-profile customer making a transition from their own internal world-wide network to a more commercial T-carrier based system. The company I worked for supplied the necessary gear to interface between $TELCO and their own equipment. This wasn't pre-Internet, but it was before the general use of the Internet for routing internal traffic around the world, so all their WAN links were supplied by one $TELCO or another. Call it mid 1980s.
Our customer service got a phone call from the customer allowing as to how one of their offices in Sydney, Australia refused to see the rest of the world. Customer service called me (the primary TAC Engineer for the customer), and I eyeballed it. Digging into the network, I could see that a loopback switch in the Sydney office was thrown, it would need to be flipped back to connect their LAN to their WAN. I informed customer service, and figured that was the end of it. Until about two hours later when my Boss wandered in and asked what I knew about Sydney being down. I blinked three or four times to reboot (kernel hacking again, probably) and told him I had located the cause and informed our guys as to the fix, and then got on with putting out fires elsewhere.
He replied that apparently the dude in charge of the Sydney office didn't like the answer, had called his Boss, who called his Boss, who called the director of the Australian branch, who called the owner of our company, who was informed by our CS guys that I was responsible, and so now my Boss had been put in charge of fixing it. He wasn't happy. So using my TAC access, I showed him the "fault". He expressed disbelief. And called the owner down to my office. The owner (the engineer who founded the company, and a real tech, not just a suit) also expressed disbelief. I believe his actual words were "What the fuck are those useless fucks doing?" ...
ANYway, he called the director of the Australian branch (just a suit, apparently), who got all shouty and demanded an immediate fix, now, or we'd lose the entire contract if he had anything to say about it. Our owner tried to calm him down, but the dude wasn't having any of it ... so to make a long(er) story short(er), he promised to "put his best man on it" ... and I got sent to Sydney on the next flight. Out of San Francisco. First Class. At very short notice. To flip a switch. With invoice in hand, to be presented personally to the Director in Oz. I honestly thought he was going to take a swing at me when he read it ... it was a tick over $20,000 ... in mid-1980s dollars. Broken down in glorious detail. To flip a switch.
But wait ... it gets better! When I was at the airport heading home (having been in Australia for maybe 2 hours total), I got called to the proverbial White Courtesy Phone[0]. Seems a different branch of the very same company had a similar problem, this time in a satellite office outside Boca Raton, Florida. I called my Boss and asked something like "WTF‽‽‽". He tiredly allowed as to how he personally had checked, and indeed it was the exact same issue. Our owner had asked if I wouldn't mind doing the hono(u)rs ... a completely different Director had called and threatened him in a similar manner to the first. So instead of taking the long east-bound flight home six hours later, I had to take an immediate West-bound flight, changing planes in Jakarta and London, to Florida. Arriving somewhat cranky & disheveled in Boca, I was rather pleased with the similar result (one switch, and out), except I didn't feel physically threatened after the Director read the invoice. This one just went white and slumped in his chair. I excused myself.
Back to the airport, and home to California. Still First Class. Four+ days on the road, literally once around the world, no hotel rooms, not a single proper meal, showering in airports, just to flip two switches. Such was the life of a field engineer. Tell that to kids these days ...
[0] If you don't know a white courtesy phone is, ask yer Gran. This was in the halcyon days before ubiquitous cell phones, and I had left my DynaTAC at home ... it not only wouldn't have worked in Oz, it probably would have been confiscated at the airport.