I guess you could stab someone with a comb. I've seen combs that have a long sharp end. Maybe they too should be banned, but then again, Ive seen ladies in spike heels that looked so sharp that they could be possibly used for stabbing someone. Then again, one could always sneak a steak knife out of the dining room--- of well, I guess if one's bent on murder, there's no end of weapons-- a comb, a spike heel, a knife from the dining room, a shoe lace or belt to strangle someone and the list is endless.
I'm getting so paranoid I almost attacked and stabbed my own shadow in the kitchen this morning !!