Worst case of manning up I ever saw was a work collegue some years ago. He had flu, I mean proper flu but was "too important to not come in". The manager of the department was all happy with him, showing loyalty etc.
The following week most of us didn't turn up as he had spread it to most of the office (poor airflow etc), he wasn't quite so much the hero then.
Worst case for me personally again some years back. Had a french boss, who was terrible with planning etc. I was off as I had a migraine, a genuine one, which I was suffering a bit from them at that time as same said boss was useless and basically making projects loads harder and more stressful due to his incompetence, I do get stress related migraines, now I know what I hadn't at the time, stress was my main trigger basically. He called me, and i stupidly answered the phone, he had decided to plan a meeting for lunchtime after knowing I was off ill, I has assumed he needed some urgent advice on a project, but it was a completely pointless meeting that could have happened the next day or something. He was reallllly unhappy, and demanded I updated him every 30 minutes if I could make it in. I called him once then said i'm not coming in. He reluctantly cancelled this hyper urgent meeting, and eventually held it about 3 weeks later, after which everyone was like "what was the point in that meeting, he could have just sent an email to that effect"