Ross Tuck makes the case that not all code is equal.

Most teams follow the Broken Window Theory, fearing even a single tradeoff starts the slide down a slippery slope. This can reduce discussion (read: dissension) in the short term but leads to arbitrary compliance or worse. ... Deciding on a level of quality isn’t like deciding on a coding standard, you can’t have an off-the-shelf-always-okay answer. Quality is the place to have nuanced discussions.

http://rosstuck.com/the-everybody-poops-rule