Would I direct solder a pin to get a game running in the field when out of pins? Heck yeah and I did. Would I do it in a way that leaves exposed hot wires hidden in the middle of a bundle of wires that can potentially short against something else? Hell no.
Would I secure a coil using packing tape and pennies? Probably not but I can say for sure that if I ever did it would just be for the afternoon while I ran to get what was needed for a proper fix.
So ingenious field hack to get a game running? Maybe... but also terrible in that those pennies could have easily fell and shorted the coils lugs, the game still didn't play right.
Heck... even just a couple weeks ago ran into a game where a target bracket broke. The owner has no spare available we just zip tied a flipper rubber into the hole so balls wouldn't jam then jumpered to a neighbor in the same column to keep the mode accessible for players. Got the game through the show and back home where it could be properly repaired.
So yeah hacks happen all the time... doesn't change the fact that they are still hacks and should be fixed properly asap.