Mac, I'm guessing BATFE agents don't keep up with case law. Although a ruling in the 3rd circuit only affects courts in that circuit, many Federal courts are loathe to issue differing opinions in similar cases. NJ and NY seem to be the most unfriendly to gun owners even when they try to comply. Because of their aggressive actions and the ruling from the 3rd circuit, I would recommend that anyone stuck in a city during a layover, accidental or not, store their weapon in compliance with this ruling. I have not had to do this but I'm guessing either the airline or perhaps a Skycap or someone else can make arrangements for overnight storage
Seems like an easy way to avoid a huge and expensive hassle.