Is the Ghoulbane quest active?
 

This one.

http://wiki.project1999.com/The_Sword_of_Nobility

In the link you provided it states:

This quest was implemented when The Warrens went live (Hate & Fear revamp).

-Mcoy

I don’t know what that means.

That means post Velious launch, unfortunately.

I remember the patch notes, something along the lines of "Many paladins have questioned the ethics of killing another paladin for his blade".