I would imagine fire would be the biggest concern if the neutral lug (or other connection of the neutral) allowed the infamous 240V series to smoke a few appliances.
Ground reference may be lost in places with poor soil, and poor grounding.
Someone in a panic to unplug said smoking appliances could be hurt by burn or electrocution.
Just MHO...
Any additional comments?
-Virgil ('66)
-Virgil Residential/Commercial Inspector 5 Star Inspections Member IAEI