Yes, according to a 1980 study if a person that is 150lbs three pounds of this chili could take there life. See article here
But to give a better answer than the one above considering know human person would ever being able to eat 3lbs of the ghost pepper that would be around 150 fresh ghost pepper pods. So lets talk about the heat of the pepper, hot peppers heat is only something our mind thinks is happening.
What certain people have experienced from other super hot peppers where thunderclap headaches and a hole in there throat liner.
However the person that had there throat liner burned wasnt from the pepper but from the stomach acid from throwing up after eating the pepper as the stomach is loaded with acid so if you make yourself vomit that can cause more damage then anything.
So in a real world not 1980 the answer would be no ghost peppers will not kill you nor will any other hot pepper kill you.
How hot is the ghost pepper? It’s hot enough for people to think it will kill them, people google it all the time i guess.