The sound of a siren increased to an ear-piercing level as an emergency vehicle sped by my car. Its flashing lights glared through my windshield, illuminating the words “hazardous materials” printed on the side of the truck. Later, I learned it had been racing to a science laboratory where a 400-gallon container of sulfuric acid had begun to leak. Emergency workers had to contain the substance immediately because of its ability to damage whatever it came in contact with.

As I thought about this news story, I wondered what would happen if sirens blared every time a harsh or critical word…