Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away.

-Antoine de Saint-Exupéry

Negative Code is something that I've never been aware of before I started to attending school.

Before this, I would mostly copy/paste other work into the projects to make my customers their website. I only coded a few lines here and there to fix some things I could find out myself or I asked it on Stack Over Flow. I was almost always was the person below.

Knowing now how important it is to have the proper and understandable code I would not be reluctant to say, without having almost no copy of the work I did from that time, that it mostly was hold together by pieces of duct tape because of not knowing about negative coding.

Yes, but less as possible in development, main reason is productivity. After that, we've got a refactoring stage, synced with RC during QA and before integration.

Yes, but generally we ignore it. ;) Who wants to touch something that's already working.