The initial Ducks logo was an old-school goalie mask in the shape of a duck bill (with no actual duck, though there is mascot Wild Wing, who is fun to mention simply to reference the time he caught on fire). There's no real violence or aggressiveness involved here, though I suppose you could make the argument that famed cinematic serial killer Jason Voorhees wore a goalie mask, so maybe this isn't such a Disney-inspired idea; instead, that's a serial-killing duck after you. This is even more so when you look at the alternate logo; this duck mask has obviously been throw the ringer, or at least played behind Keith Ballard, as it's permanently molded to his scowl.
-From my FTR post on animal logos for NHL teams. Sharks, Ducks, but sorry, no Kings. But hey, it's better than being a Wild, right?