It will never kill Facebook. Facebook as an entity will still exist. Sure there might be a change in ownership, lawsuits, etc. But nobody involved would want to threaten the functional business / golden goose which is Facebook.
Good intent doesn't always end up with good result. Maybe this guy doesn't want Facebook to die, but without Zuck, the company culture, the engineers will flee away rapidly. It will never be a good change to hand a tech company to a "wood fuel salesman".
Well, he did have the foresight to invest a mere $1000 in a potentially worthless venture, but more surprisingly, he had the patience to hang on to it. It would make for a rather infamous turn of events either way.
