Live and learn, chances of the animal he just bought dying are just shy of 100%, Im all for helping out and giving advice but this type of behavior should be scolded and looked down upon, not given an "Oh well, sh*t happens". This is no less of an animal than a dog or cat, just because it doesnt greet you at the door doesnt mean it isnt alive. What would your reaction be if he brought a puppy home even though he was unable to feed it and didnt even know how?
That being said, as stated previouslyl these animals have a very poor survival rate in captivity, and are certainly not fit for a mixed reef environment. The only real chance it has of surviving is being placed in a well matured species specific system. And again, this hobby requires responsibility and research, its bad enough were taking animals from the reef to begin with, lets no condemn them to certain death as well, do your homework before buying.