From Joanna in Illinois:

Not only do fireflies amazingly light up like they were chain-smoking cigarettes in the backyard, but they don’t do any of the annoying things that other insects do like buzz, sting, bite, drink your blood, attach themselves to you or your dog, contaminate your food, ruin your picnic, destroy your crops, or chew up your house. And, by the way, if you have one of those torture devices on your patio commonly known as the “bug zapper,” then get rid of it immediately because it lures fireflies and then electrocutes them.

A firefly?
Car driving
with its turn signal on—
no corners in sight.—Joanna Key