FLC ABORTED TKOF IN RESPONSE TO TKOF WARNING.

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ADVANCED THRUST LEVERS FOR TKOF AND TKOF CONFIGN WARNING HORN SOUNDED. I IMMEDIATELY REDUCED THRUST AND TAXIED UP TO NEXT INTXN AND TAXIED CLR. FO HAD ALREADY RPTED REJECTING TKOF. TAXIED TO 'CLR AREA' AND RECHKED FLAPS/SLATS; ETC; FOR PROPER CONFIGN (THEY WERE) AND HANDLES COMPLETELY SEATED. ADVANCED THRUST LEVER; NO HORN SOUNDED. WE REDID ALL FLOWS AND CHKLISTS AND DEPARTED RWY 19R WITHOUT INCIDENT. THE ACFT MANUFACTURER AND MY AIRLINE BOTH ALLOW TAXIING WITH #2 ENG IN REVERSE TO SLOW TAXI SPDS WHEN LIGHT. I ROUTINELY DO THIS TO SAVE BRAKE WEAR. THE ONE CAVEAT IS TO MAKE SURE THAT YOU DO NOT PULL THE REVERSE HANDLE UP FAR ENOUGH TO PHYSICALLY POP SPD BRAKE HANDLE INTO ARMED POS. I TRY TO ALWAYS CHK SPD BRAKE HANDLE WHEN STOWING REVERSER. SOMETIMES (OFTEN) THE HANDLE WILL NOT BE ARMED BUT JUST SLIGHTLY UNSEATED; IN THIS CASE ENOUGH TO SOUND THE CONFIGN WARNING HORN. NOT A BIG DEAL; BUT I WILL BE MORE CAREFUL IN MY THRUST REVERSER/SPD BRAKE FLOW. POSSIBLY THE USE OF REVERSE THRUST FOR TAXI NEEDS TO BE READDRESSED BY COMPANY TRAINING DEPT.