PRIVATE PLT MADE LOW PASSES OVER A DOWNTOWN PARADE WITHOUT AUTHORIZATION.

Narrative

BACKGND: HAD BEEN INVITED TO MAKE LOW PASS OVER PARADE; BEHIND AEROBATIC ACFT FROM CA ON PREVIOUS YR (1991). THIS YR (1992) DURING TRIP TO BUTTE; MT; A LCL PLT AND FRIEND ALONG AS PAX; AND I DECIDED TO MAKE A PASS AGAIN; AND ANNOUNCED OUR INTENTIONS ON LCL FSS FREQ (122.6). WE VISUALLY CLRED THE AREA AND MADE 1 PASS S TO N; THEN ANNOUNCED AGAIN AND MADE ANOTHER N TO S OVER THE PARADE RTE. BOTH AT AS CLOSE TO 6100 FT MSL AS POSSIBLE (BY MY ALTIMETER). 2 FGTS FROM AN AIR FORCE BASE HAD PREVIOUSLY MADE A LOW PASS AND WERE OUT OF THE AREA. AFTER OUR 1/2 HR FLT AND UPON LNDG AT THE ARPT; I WAS ACCOSTED BY A LCL POLICEMAN; WHO DEMANDED MY IDENT. HE WAS EXTREMELY ANGRY AND SAID HE HAD NEVER SEEN AN AIRPLANE FLY SO LOW. HE THEN RANTED ABOUT HOW 3 PEOPLE WERE KILLED IN AN AUTO ACCIDENT IN DILLON; MT JUST A WK AGO. I DIDN'T SEE THE CONNECTION; AND I GOT THE IMPRESSION THAT HE DOES NOT LIKE AIRPLANES. I TRIED TO EXPLAIN THAT I WAS VERY SAFETY CONSCIOUS; BUT HE SAID HE WAS GOING TO FILE A RPT; AND I HADN'T HEARD THE END OF IT. I CALLED THE LCL FSS AND TALKED TO FAA PERSONNEL. ASKED IF HE HAD RECEIVED ANY CITIZEN COMPLAINTS (THIS WAS 2 HRS AFTER THE INCIDENT AT PM15). HE SAID NO. I DON'T THINK I SHOULD HAVE MADE THE FLT; ESPECIALLY CONSIDERING THE REACTION OF THIS MAN; AND I WILL NEVER DO IT AGAIN.