LEAR 60 FLC STOPPED OVER THE HOLD SHORT LINE AFTER MISTAKENLY RESPONDING TO ANOTHER ACFT'S TAXI CLRNC AND THE GND CTLR NOTICING THEM GETTING READY TO CROSS THE RWY WITH ANOTHER ACFT ON FINAL.

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WHILE TAXIING OUT TO RWY 3 AT SCOTTSDALE ARPT FROM THE HANGAR; GND CTL ADVISED TO TAXI UP AND HOLD SHORT RWY 3 AT TXWY B10. FROM THIS HOLD AREA VISIBILITY IS RESTR DUE TO CONSTRUCTION. THE ACFT WAS BROUGHT TO A COMPLETE STOP AT THE HOLD SHORT LINES. BOTH THE CO-CAPT AND MYSELF BELIEVED WE HEARD GND CTL ISSUE INSTRUCTIONS TO OUR ACFT TO TAXI FOR RWY 3 AND FOLLOW THE SINGLE-ENG CESSNA ON THE OTHER SIDE OF THE RWY TAXIING FOR RWY 3. CO-CAPT (MYSELF) READ THESE TAXI INSTRUCTIONS BACK TO GND CTL EXPLICITLY. THE CAPT BEGAN TO MOVE THE ACFT. WE REACHED A POINT WHERE 1/2 THE ACFT WAS OVER THE HOLD SHORT LINE. THIS WAS APPROX 15-20 FT. NO PART OF THE ACFT EXTENDED OUT ONTO THE ACTIVE RWY. THIS WAS APPROX 10 SECONDS AFTER THE TAXI CLRNC WAS READ BACK AND THE ENGS ON THIS ACFT TAKE 7 SECONDS TO SPD UP ENOUGH TO MOVE THE ACFT. IT WAS AT THIS POINT THAT GND CTL NOTICED OUR MOVEMENT AND TOLD US TO HOLD SHORT. THERE WAS A SINGLE ENG AIRPLANE ON FINAL THAT WE WERE TOLD TO HOLD FOR. AFTER THIS ACFT TAXIED OFF 3000 FT BEFORE OUR AIRPLANE; WE WERE CLRED TO CROSS THE RWY AND TOLD TO CONTACT THE TWR. WE FEEL THIS PROB AROSE DUE TO THE FACT THAT WE GAVE A COMPLETE READBACK OF THE CTLR'S INSTRUCTIONS AND IF WE HAD MISTAKEN CALL SIGNS THE CTLR SHOULD HAVE TOLD US TO HOLD SHORT. THIS IS A BUSY ARPT WITH LOTS OF TRAINING AND MANY TIMES CTLRS ARE WORKING MORE THAN 1 FREQ. WE CONTACTED THE SUPVR BY PHONE AS REQUESTED AND WERE TOLD THAT A PLTDEV HAD OCCURRED AND THE FAA HAD BEEN NOTIFIED. IN THE INTEREST OF SAFETY WE FEEL THAT THE PHONE CALL WE MADE WAS MORE THAN ADEQUATE FOR BOTH PARTIES TO HAVE DISCUSSED WHAT OCCURRED. NO AIRPLANE AT ANY TIME HAD TO DEVIATE FROM ITS FLT PATH OR EXECUTE A GAR OR WAS IN A POS OF A TFC CONFLICT. WE FEEL THAT THE ACTION TAKEN BY THE SCOTTSDALE TWR IS EXCESSIVE; DOES NOT PROMOTE SAFETY AND ONLY HAMPERS THE WORKING RELATIONSHIP BTWN ALL ACFT AND ATC ON THIS FIELD.