I assume that you refer to the posting headed Default Music Player. This was responded to by a very foolish answer which the original poster in turn responded to aggressively.
I consider that the AB Editor's response was in order, and was probably designed to convey a message to all users including the two protagonists.The Ed's message does not appear impolite to me.
I offer a sporting analogy where the responder to a foul committed by an offender is also quite often shown a yellow card.