At Kings Cross, we have the very famous neon Coke sign which has been at the top of William Street for around the past forty years. In 1990, Coca Coca Amatil (Coke's Australian operations) wanted to erect a second sign above their headquarters at the time in Circular Quay. However it was to be a traditional advertising billboard which I think today would have been outdated. I personally think a neon sign would have done the job better if Coke were that keen to have their presence by the harbour. There was some resentment by Sydneysiders because it was "desecrate" the area.
Source: The Daily Telegraph, August 9 1990, Page 9.