Dog one
It did happen in the days of flight service, because there was so much radio chatter that the radio was not effective. I know of a case where a king air taxiing at Ayers rock made the right radio calls, heard replies, and on making the departure call, found he was nose to nose with an inbound boeing. The aircraft then talked direct to one another and arranged separation. It worked much better that way, as there was no time to talk to a third party.
Both the kingair pilot and the FS officer had along discussion afterwards, and replayed the tape many times. The radio channel had been overloaded and was not effective. When you take one party out (the FSO) it works much better.