I believe you guys are on to something regarding the increase risk of shipping damage if the label says fragile or loudspeaker. This is consistent with my recommendation that Axiom should double box speaker shipments to reduce shipping damage. Perhaps the label on the outside box should read:

Compact fluorescent light bulbs (CFLs) inside -- contains the toxin Mercury. If you drop or puncture this box, please do not breath the Mercury dust.

I bet that the outside box with this label would arrive undamaged even in the greater Philadelphia area.