MMU CTLR CONCERNED WITH PLT AND CTLR COM READBACKS; FREQUENTLY EXPRESSED AS SINGLE OR DOUBLE MIKE CLICKING AS RESPONSE TO CLRNC ACKNOWLEDGEMENT.

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IT IS VERY COMMON FOR PLTS TO RESPOND TO CLRNCS WITH JUST THEIR CALL SIGN OR A DOUBLE-CLICK OF THE MIKE. NEITHER OF THESE ARE GOOD RESPONSES AND SIMPLY INDICATE LAZINESS ON THE PART OF THE PLT. CTLRS ARE ALSO AT FAULT FOR USING THE DOUBLE-CLICK TO RESPOND TO PLTS. I HAVE TRIED TO GET CTLRS TO CHANGE IN MY FACILITY; BUT OLD; BAD HABITS ARE VERY HARD TO BREAK. I HAVE BEEN TOLD THAT THE DOUBLE-CLICK HAS BEEN AROUND FOREVER AND TO STOP BEING A BABY ABOUT IT! SINCE ALL AN ACCIDENT TEAM HAS TO GO ON IS THE TAPES OF THE INCIDENTS; I BELIEVE THAT DOUBLE CLICKS AND PLTS SIMPLY REPLYING WITH ONLY THEIR CALL SIGNS IS AN ACCIDENT WAITING TO HAPPEN. AS THE SKIES GET BUSIER; IT IS ONLY A MATTER OF TIME BEFORE ONE OF THESE LEADS TO; OR IS PARTIALLY TO BLAME FOR; AN INCIDENT OR ACCIDENT. I THINK A REMINDER IN THE CALLBACK PUBLICATION BY NASA THAT THE ONLY PROPER WAY FOR A PLT TO RESPOND TO ANY ATC CLRNC IS BY USING THEIR CALL SIGN AND AT LEAST A 'ROGER;' IF NOT A COMPLETE READBACK OF THE CLRNC. AND DOUBLE-CLICKS BY A PLT OR A CTLR HAVE NO PLACE IN AVIATION! LAZINESS ON EITHER SIDE OF THE MIKE JUST SHOULD NOT BE ALLOWED!