All right, once more into the breach!
After carefully reading the posts in this thread and considering the matter, it seems that clearly delineated battle lines have been drawn on an issue that is, IMHO, not a matter of black and white. While I am clearly opposed to the wholesale slaughter of elephants for their tusks, it is also equally clear that the issue of elephant survival differs from country to country on the African continent. South Africa, for example, is struggling with the issue of elephant overpopulation and the environmental impact that they have on other species (an adult elephant, BTW, consumes nearly 700 pounds of grass, trees and twigs daily); and Namibia and Botswana have booming elephant populations. An
article in today's New York Times sheds further light on this subject. Furthermore, it does not appear that cue making is a significant factor in creating market demand for ivory--the demand comes from Asia for other uses. As such, the cessation of ivory usage in cues would not impact elephant poaching one way or the other.
In my opinion, if cuemakers ceased to use ivory in cues, it would be a nice gesture of solidarity with our elephant brethren in countries where they are threatened, but it would not significantly affect their plight.