It's cross between pity and apathy. Sure, it's a sad thing to hear about someone so young taking their own life, and perhaps should be treated with some modicum of respect.
On the other hand, though, was it really that big a loss to society in general? We don't yet know the details of this particular death, or in fact much at all about this particular furry; but people who are furry 'internet exhibitionists' don't tend to be associated with people who are going to succeed in life. Unless we can dig up something to the contrary, it's probably safe to assume that this kid wasn't on the fast track to curing cancer.