I had a friend who decided to declaw his cat after it started scratching his furniture and drapes. Despite my attempt to change his mind, he went ahead with the declaw. I'm not ashamed to admit I took a measure of enjoyment when he told me the cat had ruined his furniture by bleeding all over it. In the end, he surrendered the cat to a shelter.

I'd rather a cat be taken to the shelter and face euthanization than to face that fate anyway but first be painfully and cruelly mutilated.