When you're losing money and trying to right the ship, the last thing you should do is take on the airline with the rep for killing competitors at DFW, its biggest hub; if B6 begins JFK-DFW, in a few weeks you might be reading another article like this one (with DFW replacing "PIT" throughout):

http://biz.yahoo.com/bizj/070626/1482627.html?.v=2

Everyone loves the lower fares at PIT, but not everyone abandons their frequent flyer miles and status to fly B6. Whatta surprise.