Hackers write code. If you write code and documentation, you're an engineer, good programmer, etc.
Think about what you are you saying when you're "hacking on some code" -- you are intentionally writing code that is bad, but cleverly bad enough to get the job done. "Thoroughly documented hacks" are about as nonsensical as F. Scott Fitzgerald exquisitely writing about how great it feels to take a piss.
[1] While I really want to get this confirmed from the man himself, this is unfortunately sourced from a twitter post and not entirely verifiable at the moment: http://twitter.com/#!/pcalcado/statuses/74071761897005056