DURING ROLLOUT FOLLOWING CERTIFICATION REQUIRED PRACTICE AUTOLAND PROC IN DFW; MD80 TURNS AGGRESSIVELY TO THE R AND ONLY PROMPT ACTION BY THE RPTR AVOIDED A RWY EXCURSION.

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I WAS ATTEMPTING TO GET MY 2 AUTOLANDS IN THE FIRST 100 HRS. I ELECTED THIS TRIP TO FLY THE REMAINING AUTOLAND TO RWY 17C IN DFW. A CAT 2 AUTOLAND WAS BRIEFED WITH ALL CALLOUTS TO BE MADE. MEDIUM ON AUTOBRAKES BRIEFED. ACFT WAS 120000 LBS WITH A VREF OF 127 KTS. 127 KTS WAS BUGGED AS VREF AND 132 KTS WAS SELECTED AS A COMMAND BUG SETTING. INITIAL CONTACT WITH FINAL APCH CTLR ASKED FOR ILS CRITICAL AREA TO BE PROTECTED. THIS WAS APPROVED AND WE WERE ADVISED THAT WE WOULD RECEIVE AN 11 MI FINAL AS A CONSEQUENCE. WHEN WE WERE SWITCHED TO THE TWR OUTSIDE THE OM TWR ADVISED THAT THE ILS CRITICAL AREA WAS UNPROTECTED. WE NOTICED ONE ACFT ON THE RWY WHICH WAS SUBSEQUENTLY CLRED FOR TKOF. AFTER THIS NO OTHER ACFT OR VEHICLES WERE NOTED THE FULL LENGTH OF RWY 17C. THE ACFT FLEW A VERY NICE AUTOLAND APCH MAKING NICE CORRECTIONS EVEN WITH A WIND SHIFT AND DECREASE AT ABOUT 100 FT. THE ACFT DID A VERY NICE JOB OF LOWERING THE NOSE TO THE GND. THRUST REVERSERS WERE SELECTED. THE ACFT LANDED ON CTRLINE. THE ACFT BEGAN TO TRACK CTRLINE BUT A SECOND LATER COMMENCED A SLIGHT R DRIFT. I THOUGHT; 'I'VE SEEN THIS MINOR DEV BEFORE.' SUDDENLY; THE ACFT ENTERED A DRAMATIC TURN TO THE R. I HAD BEEN FOLLOWING THROUGH WITH THE CTLS FROM APCH TO LNDG TO ROLLOUT. I IMMEDIATELY DISCONNECTED THE AUTOPLT AND RETURNED THE ACFT TO CTRLINE. THE SUDDEN DRIFT TO THE R WAS NOT A 'HARDOVER' BUT; NEVERTHELESS; IT WAS A VERY AGGRESSIVE TURN TO THE R. THIS EVENT IS CAUSE FOR GRAVE CONCERN. GND CTL THOUGHT MAYBE A TRUCK HAD CROSSED THE SVC ROAD AT THE FAR END. HE STATED THAT UNLESS THE CONDITIONS ARE ACTUAL THE ILS CRITICAL AREA IS NEVER PROTECTED. I SUGGEST THAT WE ONLY FLY CONFIDENCE CHKS OF THE AUTOLAND SYS TO CAT 2-3 CERTIFIED RWYS THAT ARE PROTECTED. I WAS UNABLE AND I AM STILL UNABLE TO ATTRIBUTE THIS INCIDENT TO THE ACFT. THE ILS CRITICAL AREA WAS UNPROTECTED. IN THE FUTURE; WHEN CONDUCTING AUTOLANDS WHETHER FOR PROFICIENCY OR ACTUAL I INTEND TO MAKE A PA ABOUT CELL PHONE USE. I FIRMLY BELIEVE THAT CONDUCTING AUTOLANDS TO CAT 1 RWYS OR UNPROTECTED RWYS IS IN ERROR.