I'm more confused by this than angered. He harmed himself more than any one else. He is out $200 and a rare system to moderately annoy other people. He cut off his own leg to annoy a paraplegic. Sure that guy without the ability to use legs might me mad at you for a day or so, but you are the one who now has no legs.
He is never going to make his money back, it would take 150,000+ views on YouTube to get the $200, and no one is going to buy that piece of crap sculpture for over $200, and most people are not going to pay the person himself any attention. They are going to hate the thing he did, but who he is is not going to pass most peoples mind. Look at the guy with the Rosalina Amiibo thing, I hear people bring up the action but no one knows his name.