The one that got to me most was the man who brought in his daughters Austin Maxi whilst she was in the maternity ward, because it was pulling to one side and I found the brake disc was so worn it had come away from the centre around the hub and he refused to have it repaired!
As an apprentice we had a taxi driver customer in an Austin A60, when I was servicing it I took the brake drums off and there was no brake lining on any of the shoes front or rear, I showed it to my boss who spoke to the taxi driver and was told he couldn't afford to have it fixed, put it back together as he had a fare collecting children from school!!!
Another time a women at the same garage asked me to look at the steering on her mini as it was loose. Loose, I could spin the steering wheel!!! Her loving husband had told her to press down on the wheel when turning as the splined clamp on the bottom of the steering column was so badly worn.
I would like to think things had improved in the 50 odd years since then, but if not they could be driving towards us!