Hey-Hey!!!, I can say I have not encountered that sort of failure. The usual is a gate-source short on the lower MOSFET, and this is prevented by the back-to-back Zener clamps.
When I have had a G-S short with a battery circuit, the short will discharge the batteries through the R-set and ~250k filter resistor. One discovers the problem quickly and a 'trace' gets lifted to open the circuit...:)
Anyway, I don't see much risk, either to equipment or the wallet, and certainly not the operator( that would be US ). cheers, Douglas
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