Is it correct that a jet fighter can be used as a non-lethal (sonic) weapon?
Sonic booms from low flying aircraft, while loud, don't seem to cause hearing damage, as this F-14 pilot demonstrates during a Tiger Cruise air wing demonstration.


                
            

Now military fighters will sometimes make a 'show of force' in the form of a low altitude, high speed pass against threat forces which don't have a substantial IADS capability in order to motivate them to disperse under threat of employing ordanance on them if they continue belligerence.

UPDATE:  I found this story about an F-16 2-ship over Iraq on a CAS patrol mission.  The pilots get a radio call from desperate SOCOM operators pinned down by enemy troops at night.  The pilots cannot get a IR strobe to track for bombing, so the lead Viper uses a sonic boom delivered from a dive to frighten off the combatants.