Rhino horn is also highly coveted in Yemen for the making of dagger handles for coming of age young men. Called a janbia or janbiya the daggers are very much a status symbol and depending on the type of handle material, increase the status of the wearer. Rhino horn is right at the top for value. To me that makes more sense than the very dubious medicinal properties claimed by some.
I reckon we mix Teledrex with Yellow road line paint and paint every Rhino's horn,,,then make it known that they're poisoned. :)