Ideal gamed answer, both true and good enough to satisfy AirBnB: "no I would spend all my savings traveling around the world to exotic and unusual places, and hacking on open source projects as time and net access permitted."

And what a small price to pay for a job! Why accept anyone who would fail to pay that price? I cannot think of a single reason.

[Job applicant must also cry self to sleep under desk.]

Exactly. And it seems like you would not want to hire the person who says "yes" because you know that person is a liar. But I guess Airbnb worked out anyway.

He would also tell people that he didn't believe in work-life balance.

That sounds to me abuse of power even coming up with that question.