Guys, first of let me say I personally dont think there is any way I would be able to kill any snake of mine, especially one that I had bred and raised.
But depending on the type of mutation...culls need to be done. If we don't cull, the snake hobby will end up just like dogs, thousands of unhealthy animals, predispositioned to things like disease or organ malfunction. Just look at dogs. Not only are there tons of unwanted mutts that are too large in number to all get a nice home, but even all the normal, pure breeds of dogs come with lots of health risks and genetic deformities. It may take 10 years or 50 years or 200 years, but lets not let that happen.
At the very least, don't breed them.