Worf is a very strong, experienced melee combatant with years of training with melee weapons. His weapon is heavier than a sword and seems to work almost by percussive smashing and piecing rather than slashing, however let us assume they replicate weapons which have the same physical characteristics for our humans.
Imagine what would happen if there was a dozen scared, almost panicing, completely untrained people swinging swords around in a confined area. It would be a nightmare of friendly fire (even without the Borg shooting at people).
I have fought on a re-enactment battlefield and had my face opened by a backswing on someone on my side and both of us had had years of training.
Even if the swords got through the Borg armour. It would have been hightly dangerous as close as that as one touch from a Borg means BIG trouble.
Worf is stronger (than most humans), better trained (at melee combat) and has his chosen weapon at hand - the humans will not be anywhere near as efficient.