I'm absolutely against it ... If it doesn't happen in the wild, then who are we to play God???
I also believe that we should be keeping lines as clean as possible and the animals looking as natural as possible so we can help educate the public better, even if we aren't demonstrators!
What happened to all this being taboo not even 2yrs ago??? What, because it's so hard to control, and you can't "frown apon" everyone you just go with it?! the phrase "If you can't beat 'em, join 'em" comes to mind.
Keep animals as clean as possible. Natural is a lot more beautiful than crosses any day. And before any of you tell me "if you were given one, you wouldn't complain". Yes, I would actually, and I would get rid of it. I don't want to be affiliated with them in any way.
Just my opinion.