SF340 CAPT WITNESSES NEIGHBORING ACFT TAXI INTO DE-ICE TRUCK AFTER MISTAKENLY ACCEPTING POST APPLICATION REPORT MEANT FOR REPORTER'S ACFT.

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I WAS CAPT ON ACFT X. WE WERE IN THE DEICE PAD ALONG WITH (IF I REMEMBER CORRECTLY) 3 OTHER ACFT. ACFT Y WAS TO THE L OF MY ACFT; 2 DEICE PARKING SPOTS TO THE S. THE DEICE CREW HAD JUST FINISHED DEICING MY ACFT AND; OVER THE RADIO; SAID; 'ACFT X; YOUR DEICE INFO IS...' IMMEDIATELY AFTER HE WAS FINISHED READING THE NUMBERS; I HEARD SOMEONE ELSE READ THEM BACK. ALTHOUGH THEY MAY HAVE READ BACK THEIR AIRPLANE NUMBER; I DID NOT HEAR WHO READ MY DEICE INFO BACK. I DID HEAR THE DEICE CREW SAY 'ACFT X;' SO I GOT ON THE RADIO AND SAID; 'VERIFY THAT INFO WAS FOR ACFT X.' THE DEICE CREW DID REPLY WITH; 'AFFIRMATIVE; ACFT X THAT WAS FOR YOU' TO WHICH I REPLIED; 'ROGER; I COPIED THE NUMBERS BUT SOMEONE ELSE READ THEM BACK.' SINCE THERE WERE (I THINK) 3 OTHER ACFT IN THE DEICE PAD AND LOTS OF ACTIVITY; I DID NOT HEAR WHO ACTUALLY READ MY FLT'S DEICE INFO BACK. APPROX 1 MIN LATER; I HEAR A PANICKED 'STOP; STOP; STOP' OVER THE DEICE FREQ. SO I IMMEDIATELY LOOKED OUT MY L WINDOW AND SAW ACFT Y STARTING ITS TAXI. BEFORE I COULD EVEN REACH FOR THE MIKE MYSELF I SAW THE R WINGTIP COME IN CONTACT WITH THE DEICE TRUCK. I CANNOT ANSWER FOR ANOTHER FLT CREW; BUT I THINK IT'S OBVIOUS THAT SINCE THEY READ BACK THE DEICE INFO; THEY THOUGHT THAT THE DEICE CREW WAS FINISHED WITH DEICING THEIR ACFT AND WERE CLRED TO TAXI AHEAD. BELIEVE IT OR NOT; THIS OCCURS VERY OFTEN. I HAVE HEARD OTHER ACFT ANSWER FOR OTHER ACFT BEFORE. THERE IS A LOT GOING ON IN THE DEICE PAD AND THERE WAS DEICE NUMBERS BEING READ OVER THE RADIO ALMOST CONSTANTLY. OBVIOUSLY DILIGENCE IN LISTENING TO THE RADIO IS A MUST. BUT PERHAPS INTRODUCING ANOTHER FREQ TO THE DEICE PAD MAY HELP. WHY HAVE 5-10 ACFT ALL ON 1 FREQ? SPLIT THE DEICE PAD UP INTO SECTIONS AND HAVE EACH SECTION USE A DIFFERENT FREQ. PERHAPS ALSO; ACFT SHOULD NOT TAXI OUT OF THE DEICE PAD UNTIL THERE IS A PERSON WITH WANDS IN FRONT (OR TO THE SIDE) OF THE ACFT CONFIRMING THAT THAT ACFT IS INDEED CLRED TO TAXI.