I'm not sure I have a good answer to your question, but I remember reading somewhere a little story about a developer on a team whose net lines of code written (total written - total removed) was always at a negative or small value. This would imply laziness or perhaps just deleting comments or garbage, but interestingly enough, the developer was refactoring large chunks of code.

Maybe a fun little metric/competition could be "Fewest net lines of code written while maintaining full/greater functionality"