I don't believe feeding live is morally wrong.

Snakes naturally eat live food. Though feeding live is not the same as a snake eating a wild rodent. In the wild the rodent has a chance to escape. Sometimes they get caught sometimes they don't. That's the way of nature. Feeding live makes you responsible for the animals death because you are going to make sure your snake does eat it or it will go to another snake that will eat it.

I'm not saying it is wrong. Don't you live feeders get in a tizzy. It's a matter of choice that's all.