SMA PLT GIVES WRONG DEST IDENT TO DEP CTLR ON DEP FROM CLASS C AIRSPACE. HE IS RELEASED FROM ATC CTL BUT ON A COURSE THAT TOOK HIM ACROSS THE ILS INTO THE ARPT. HE SIGHTS A GULFSTREAM ON APCH; BOTH ACFT MANEUVERED TO AVOID CONFLICT. RPTR ACFT WAS BEING ISSUED AS TFC TO THE GULFSTREAM WHO HAD SIGHTED HIM.

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BASED AT OAK FOR LAST 13 YRS. TIRED OF CONSTANT ATC DIRECTIONS FROM FLYING IN AND OUT OF CLASS C AIRSPACE WHICH UNDERLIES CLASS B. THIS EVENT RESULTED FROM TELLING GND CTL AT OAK THAT MY DEST WAS LVK INSTEAD OF ACTUAL L08. THUS TWR TERMINATED ATC SVCS 4 NM E WITHOUT REQUIRING HDOF TO BAY APCH; THEN I TURNED ON COURSE USING GPS RECEIVER WHILE MONITORING APCH. HOWEVER; I LET MY MONITORING AND SCAN SLIDE TO THE BACKGND AS I ENGAGED IN CONVERSATION WITH WIFE IN R SEAT. AS I CROSSED THE ILS COURSE TO RWY 27R AT OAK I SUDDENLY NOTICED A GULFSTREAM BUSINESS JET INBOUND ON THE ILS AT MY 11:30 O'CLOCK POS; 1/2 MI AND ON A COLLISION COURSE. AS I TURNED R IN AN AVOIDANCE MANEUVER I BECAME AWARE THAT THE APCH CTLR HAD BEEN ADVISING THE JET OF MY POS AND ALT. WHILE THE SIT RESOLVED ITSELF WITHOUT A SERIOUS HAZARD; MY ACTIONS WERE DERELICT. RESOLVED: 1) USE ATC SVCS IN COMPLEX AIRSPACE FOR SAFE SEPARATION IS WHY THEY ARE THERE; AND 2) MAINT A STERILE COCKPIT AS DO THE AIRLINES WHEN IN BUSY AIRSPACE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THERE HAS BEEN NO FOLLOW-UP OF ANY NATURE ON THE INCIDENT. HE KNOWS THAT HE CAUSED THE PROB AS HE GAVE THE WRONG IDENT FOR HIS DEST AND WAS RELEASED FROM APCH CTL. HE ALSO CHOSE NOT TO MAKE FURTHER CONTACT AS HE IS 'TIRED OF DEALING WITH CTLRS COMING IN AND OUT OF OAK.' HE DOES; HOWEVER; ACKNOWLEDGE THAT THEY ARE THERE FOR HIS SAFETY AND WILL NOT MAKE THIS MISTAKE AGAIN. HE DOES MONITOR BAY APCH AT ALL TIMES EVEN WHEN NOT IN CONTACT BUT WAS STILL QUITE SURPRISED TO SEE THE LIGHTS OF THE GULFSTREAM SO CLOSE. BOTH ACFT MANEUVERED TO AVOID CONFLICT. ACTUAL DEST WAS BORREGO SPRINGS; CA; AND HE WAS FLYING A CARDINAL.