Sonic booms have a lot of, lot of, lot of throw. There would be no way to confine a sonic boom to just the airfield. People two towns over would have have car alarms set off and houses shaken. It would upset animals, it would upset people! It would trigger PTSD for some and panics for others. It would generate hundreds of phone calls to 911.
Keep in mind the airplane has to accelerate to and through supersonic well before the airfield, and then has to slow down again. It's covering a mile every 5 seconds, so this, combined with the throw, sweeps a whole lot of area.