Words are good. Words allow us to express ourselves. If we didn't have words, we would probably be stuck drawing pictures all of the time, which would make for a very image rich world, but one filled with scribbles everywhere. If you think graffiti is a problem now, just consider what life would be like if every spare inch of wall space had been scrawled on and we all had to walk around with whiteboards around our necks simply to be able to communicate anything. In emergencies, you would have to be alerted by massive flashing lights, or perhaps people would throw paint on you.