ZOB CTLR DESCRIBED ACR TRACK ERROR EVENT; NOT REPORTED; BECAUSE OF CONCERN REGARDING POSSIBLE CTLR MISTAKES DISCOVERED DURING REVIEW.

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ACFT X DEPARTED DTW ENRTE TO CYUL. THE ACFT DID NOT FOLLOW ITS FILED FLT PLAN AS DEPICTED IN THE NAS. WHEN QUESTIONED; THE ACFT [CREW] EXPLAINED THAT THEY WERE GIVEN A DIFFERENT CLRNC THAN THEIR CANNED FLT PLAN. THERE WAS NO CONFLICT WITH ADJACENT AIRSPACE OR OTHER ACFT. MY REASON FOR SUBMITTING THIS RPT IS BECAUSE I DID NOT WANT TO BRING THIS NON EVENT TO THE ATTN OF MY SUPERIORS BECAUSE I WAS AFRAID OF THE FAA PULLING TAPES AND RADAR REPLAYS JUST TO SEE IF I HAD MADE ANY OTHER MISTAKES NOT CONNECTED TO MY INFO REQUEST. IT HAS OCCURRED SEVERAL TIMES VERY RECENTLY THAT A MISTAKE WAS ASKED TO BE LOOKED INTO ON PLTDEVS AND AFTER ALL WAS SAID AND DONE A DISCREPANCY RPT WAS WRITTEN UP ON THE CTLR DEALING WITH OTHER ISSUES HAPPENING DURING THE PLTDEV. LESS AND LESS NOW; CTLRS ARE NOT RPTING MINOR ERRORS NOT AFFECTING ANYONE FOR FEAR OF BEING CRITIQUED ON THEIR PERFORMANCE WHEN ALL THE CTLR WANTED TO KNOW IS WHETHER SOMEONE ELSE HAS MADE AN ERROR. THIS WILL START TO BECOME AN ISSUE BECAUSE MINOR TECHNICAL PROBS WILL NOT BE RPTED AND THEY WILL BEGIN TO PILE UP FINALLY CAUSING A MAJOR PROB. THE ACFT IN QUESTION WAS CLRED VIA THE ST CLAIR 3 DEP BUT NOT WITH THE PROPER TRANSITION.