Upload & Sell: Off
I tend to agree a bit for why should we care? It's in every profession and area of business all over the world. You can try to stop it but you never will. If someone wants to steal your images, they will. It's too easy.
I do think we need to care and do a better job protecting our work. As much as we all hate watermarks, it might be time to bring the ugly back.
As for saying something bad should happen to this person. That's just f'd up. Anyone that wish due harm to someone is not the kind of person we can call a professional. Karma is a bitch and when you cheat on her she fucks your shit up. He will get karmas dick kick soon enough. We don't need to wish it upon him.