ZDC CTLR DESCRIBED CONFLICT INCIDENT WHEN VFR ACFT DECLINED CTLR'S REQUEST TO ALTER DESCENT AND CONFLICTED WITH ACR AT 10000 FT.

Narrative

PA46 ENTERED KENTON (53) SECTOR VFR/165 GOING DIRECT DEST (ESN). HIS PROFILE DSCNT TOOK HIM THROUGH PHL ARR TFC ON DUPONT ARR. I ADVISED PA46 TO REMAIN AT OR ABOVE VFR/125 TIL CLR. HE ADVISED ON PROFILE AND WOULD NOT STOP DSCNT; 'THAT'S WHAT I HAVE EYEBALLS AND TCAS FOR;' WERE HIS EXACT WORDS. HIS DSCNT WAS PUTTING HIM HEAD ON WITH B737 WHO WAS LEVELING AT 10000 FT AND BEING HANDED OFF TO PHL. I CALLED TFC TO BOTH AND ADVISED PA46 TO STOP DSCNT AT 10500 FT. HE REFUSED; AGAIN TELLING ME HE'S ON A PROFILE DSCNT. I TOLD HIM (THIS TIME I DIDN'T ADVISE) TO EXPEDITE HIS DSCNT FOR TFC AND AGAIN CALLED TFC TO B737. WHEN B737 RESPONDED; I HEARD HIS TCAS AND HE CLBED ABOUT 600 FT. WHEN IT WAS OVER; I ADVISED PA46 THAT; ON PROFILE OR NOT; WHAT HE DID WAS DANGEROUS AND THAT HE CAUSED AN AIRLINER ON AN IFR CLRNC TO TAKE ACTION. HE SIMPLY RESPONDED 'ROGER.' PA46 HAS DONE THIS EXACT MOVE IN THE SAME PLACE BEFORE. LAST TIME; HE BLATANTLY DSNDED THROUGH A PHL HOLDING PATTERN CAUSING 2 ACFT TO CHANGE THEIR ALT (FOR THE RA) AND LOSS OF SEPARATION.