Kind of stumped about what to say on the subject, but it's an ultracool name of a song on the soundtrack and thought it makes a good topic name. FAFDM deserves a fresh topic every month. I think VOK is the background music after Blondie kills the 3 henchmen during the diversion while the madman Indio robs the Bank of El Pason.
Maybe it's just me but isn't killing a little harsher than a mere vice, maybe more along the lines of Mortal Sin or something? Vice of Killing makes it sound like a nasty little habit like smoking. But then, in a Leone movie it usually is.
actually, Vice Of Killing, as it appears on the soundtrack, is the piece used when Volonte sends Eastwood riding into town to make sure it's okay, only to run into Lee Van Cleef shooting apples from a tree.
So maybe the "Vice" had somesthing to do with apples.