Since only one player in the game has the sword, and it takes nearly perfect timing to dodge a sword lunge, the wielder is virtually invulnerable--provided he is not a complete idiot, and pays no attention to where his enemies are/might be.
Any gamer, and even a casual observer, would make the obvious conclusion that the sword is a dominant weapon, and anyone choosing NOT to pick it up is somehow cognizantly flawed. However, many, many players will, upon being killed by a sword-wielder, scream out the the swordsman has no skill, shouldn't be playing halo, and is a n00b, rather than change their tactics to either adjust for their lack of the sword, or to take the sword from their enemy via superior skill and strategy. (That would apparently require altogether too much thought, concentration, and planning)
"He's got no REAL skill. He only went on a killing spree because he's a sword whore. Holy crap he's dead? Gimme that sword, I'm keep it the rest of the game and get a killtacular."
Swordsman: Whoosh. Whoosh. Whoosh. Bang Bang. Kaboom.
scrubs (x4)OMG U SWORD WHORE!!!