The only argument I have ever heard against declawing is that the cat would be unable to defend itself against predators if it were outside. However, declawing is only done for cats who will not be allowed outside, ever, under any circumstances. Keeping a cat indoors protects it from being struck by cars, catching diseases such as rabies, and breeding with random cats. It is true that the average life span of indoor cats is several years longer than the avg. life span of cats that are allowed to roam outdoors. I don't see how you can compare declawing to practices such as cropping a dog's ears. The latter is obviously done for aesthetic reasons only, not for practical reasons. Of course cropping should be illegal. Declawing is performed as a surgery, with the cat under anesthesia and given antibiotics, proper wrapping of the paws, and follow-up care. It's only performed by licensed vets. Then the cat will have a much longer, and fully happy, indoor life. Would you also say that it's "inhumane" to spay or neuter your pet? I think not! Declawing is more comparable to the practice of spaying/neutering than it is to those purely aesthetic practices. Besides, isn't it "inhumane" when birds, chipmunks, moles, rabbits, frogs, etc. die slowly and painfully from bites from an outdoor cat?