SMT ACFT PLT PROCEEDS TO TAKE OFF ON A RPTED CLOSED RWY AT AUO.

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ON OCT/SAT/03; AT APPROX XA00 I WAS PLANNING ON A VFR NIGHT DEP FROM (AUO) ARPT. I CHKED THE WX ON THE COMPUTER AND OTHER INFO FOR THE FLT. I THEN WENT TO THE AIRPLANE AND CONDUCTED A PREFLT. AFTER THIS THE PAX AND I BOARDED THE AIRPLANE AND PLANNED FOR DEP. I PLANNED ON VFR DEP AND TO POSSIBLY GET FLT FOLLOWING ONCE AIRBORNE. BEFORE TAXI I CHKED THE INFO ON AWOS AND MONITORED THE CTAF FREQ. AUO IS AN UNCTLED ARPT AND WAS UNCTLED ARRIVING THERE AT APPROX XA00 THAT SAME DAY. I TAXIED TO RWYS 10 AND 18. AFTER RUN-UP I ANNOUNCED MY INITIAL INTENTIONS TO DEPART ON RWY 10. AFTER MOVING ON RWY 10 I NOTICED OTHER ACFT PARKED ON RWY 10 TOWARDS THE END. I IMMEDIATELY TERMINATED TKOF AND BACK TAXIED TO RWY 18. THERE WERE NO OTHER ACFT IN THE VICINITY IN MOTION AND ANNOUNCED ON CTAF AND ADVISED OF THE SIT. AFTER NO ANSWER AND NO CONTACT ON CTAF I PREPARED FOR DEP ON RWY 18. RWY 10; HOWEVER; WAS LIT WITH RWY LIGHTS AND NO CLOSURE X'S WERE POSTED. I THEN ANNOUNCED INTENTION ON RWY 18 AND DEPARTED. AT NO TIME ON RWY 10 WAS THIS ACFT CLOSE TO; OR ENDANGERING PERSONS OR PROPERTY. AFTER DEP ON RWY 18 I WAS CONTACTED BY SOMEONE ON CTAF TO CONTACT A TWR FREQ. I DID CONTACT THIS FREQ AND ADVISED OF MY DEP. THE PERSON ON THIS FREQ STATED THAT I ATTEMPTED TO DEPART ON A CLOSED RWY AND DEPARTED WITHOUT CLRNC. THEY ALSO STATED GIVE THEM A CALL LATER. NO NUMBER WAS GIVEN OR CONTACT INFO ON THIS SIT.