I can't remember the details of the actual task. A couple years ago we got a request from the business analyst to make a change to the system. Whatever the change was I remember objecting to it, saying we would create issue in the system and there was a better alternative that wouldn't involve constant prod issue fixes (but was a substantial lift and probably not worth the effort). They decided to do it their way and assigned the story to me. Nope, I'm not going to be a part of breaking our system with some BS. I told them I wouldn't work on it for the reasons I stated. They assigned it to someone else and implementated... briefly. The business realized their mistake and rolled it back. They never tried the other implementation because it wasn't enough return on the effort, like I said. If I had been wrong I probably would have been fired. Because I was right, I kept my job but my relationship/rep with the business was shot.

I had a second issue on that same team where the business analyst wanted me to implement an accrual. The requirements didn't match with the stated intent- basically they were calling it an accrual but the requirements wanted snapshots of what would be paid later. I brought up the discrepancy and asked for some clarification. I was told "build it how the I tell you". So I wasted 3 weeks building it out. Then they again realized I was right and had me rebuild it as an actual accrual. No "thanks", no "sorry". Just "We need to build it this other way now".