|“||Now take Sir Francis Drake, the Spanish all despise him, but to the British he's a hero and they idolize him. It's how you look at buccaneers that makes them bad or good, and I see us as members of a noble brotherhood!||„|
|~ Long John Silver in Muppet Treasure Island.|
The "Grey Zone" is for morally ambiguous individuals and organizations (both fictional and real) - they can be Anti-Villains, Anti-Heroes and even (in some cases) Protagonist Villains: the main characteristic of a person or group in the "Grey Zone" is that some will consider them dangerous, criminal or "evil" while others may see them as good, scapegoats or fighting for the right thing (even if their methods are wrong).
Some characters in fiction are deliberately designed to be morally ambigous and it is up to the individual viewer to decide if they are a "hero" or a "villain", as a result each reader or viewer will probbaly have a different view of him/her. (V is a classic example of such a character, so is Ozymandias).
HIGHLY IMPORTANT: By definition, Complete Monsters can never be in this category, for CMs have no positive quality, even if some people like them.