When the dead outnumber the living on Facebook

XKCD asks a good Infocult question: "When, if ever, will Facebook contain more profiles of dead people than of living ones?"

Three answers appear, starting with the idea that Facebook's popularity peters out over the next few decades:

Next, and perhaps more scary, assumes Facebook retains its large user base:

More terrifying still is the quickest option:

Of course, if there's a sudden rapid increase in the death rate of Facebook users—possibly one that includes humans in general—the crossover could happen tomorrow.

Perhaps Facebook is now so normalized that we can only see it becoming fearsome in the future.

(thanks, Annette!)