LET'S HAVE a round of applause--or ammunition, whichever is closer--for the brave little city of Kennesaw, Ga., soon to be the pistol-packing capital of the world. What better way to scare off bad guys and attract national attention than to enact an ordinance requiring the head of every household to "maintain a firearm, together with ammunition therefor"? The only concern of any peace-loving, firearm- owning resident now is what weapon to choose--and the possibilities are almost limitless:

If the council members of Kennesaw really want to send a message to the rest of the country, they should require top-of-the-line weaponry in every household--the best every resident's defense budget can buy. Why truck with puny little handguns or clumsy cannon? And if Kennesaw is not quite ready for time-primed missile silos on every front lawn, surely the World War II bazooka could do a bang-up job on any unannounced outsiders.

There is some question as to whether only heads of households should be required to load up--since these could leave spouses and offspring in jeopardy in the event of an intramural attack or a dispute over who constitutes a head and who the body. Better to arm everybody with equalizers and let the chips fall wherever they may.

Kennesaw Police Chief Robert Ruble and others who support the ordinance note that the action was prompted by a recent ordinance passed in Morton Grove, Ill., that bans the possession of handguns by all residents there except police and military personnel, collectors and gun clubs. Says Chief Ruble, "They can forward all their guns from their police department to our police department. We'll be more than happy to accept them."

Though all this may obviate the need for a paid police force in Kennesaw, the chief is on to something constructive: why not send all the handguns in America to Kennesaw? That way, you would know where they were, and anyone who wanted to live in an arsenal of concealable weapons could go along, too. And then all the law-abiding citizens who own rifles, collectors' items or guns used in organized sporting events could go about their pleasure in peace, maybe even forming their own National Long-Gun and Sporting Association that would concentrate on their legitimate interests instead of pushing the tools of violent crime.

Maybe this is too much to hope for from one germ of an idea in Kennesaw--or maybe they're not all that serious about effective crime control. It's just a shot in the dark.