I don't really understand peoples limited vision when it comes to consumerism. You reduce a global problem to the actions of the guy next door.
Putting the elephants aside for a second, take a look at poaching as a whole. Who's doing it? The guy next door isn't, the guy he gave $1500 for a ivory inlaid cue isn't doing it either. The Cue maker didn't go out and shoot an elephant, he bought it from a dealer, who bought it from a smuggler, who bought it from the poacher.
The last 3 people in this chain of events are not nice people by any means. they represent the lowest of society as part of organized crime syndicates.
These people are, metephorically speaking, murdering people with a ivory inlaid pool cue.
They murder the wildlife rangers that are trying to protect the animals, they intimidate and exploit the local population who have very little and are more worried about putting food on thier table than they are about the elephants that live in the surrounding areas.
If you think the only harm that comes from a bit of ivory in your cue is that an elephant had to die, you're terribly mistaken.