Text (7th/8th+errata): 7/7. ; You may have ~this~ assign its combat damage as though it weren't blocked. [Oracle 2008/01/01]
You decide when assigning combat damage. [D'Angelo 1999/06/01]
You assign damage to blockers, or to the player. You cannot split it up. [Urza's Destiny FAQ 1999/05/25]
You can decide to assign damage to the defending player even if the blocking creature has protection from green or damage preventing effects on it. [D'Angelo 1999/07/28]
If a creature with banding blocks the Thorn Elemental, the defending player decides whether or not the Thorn Elemental deals damage as normal or to the defending player "as though it weren't blocked". [bethmo 1999/09/22]