The discussion isn't completely moot now, since my sister just signed a lease in Williamsburg, which I imagine means she'll have other opportunities to transit Bway Junction on the way to JFK in the future. I'm sure she'll appreciate not having to waste an extra half-hour going via 14th St in Manhattan, although I'll probably still recommend a cab if she's coming home late at night from JFK. With the rent she's saving by not living in Manhattan, she can afford a few taxis.