It's not just about what is "legal".
There's a lot of legal shit that is wrong....and at some point what's legal today is not legal tomorrow.
The real point is more personal...and there should be some thought given to the need for anyone to go purely for trophy hunting.
Something like deer hunting where it thins out the overgrown heard, and where much of the meat is consumed as food....has some level of acceptability...but hunting animals that have nothing to do with food or survival...and especially exotic animals that are getting closer to extinction...simply so someone can hang a head on a wall....well, it's kinda stupid in this day and age.
I think people can and should shed their need to kill something just for the pleasure of it all....
Oh...and the arguments that the money paid to take a trophy is used to help the rest of the animals...well fuck, just donate it if you are that worried about helping the animals. Why do you need to kill one in order to help the rest...???