Never read the BOFH ...
Now if he had:
a) Described his planned actions as a "Radical, agile, system-wide upgrade"
b) Given the plan a catchy title
c) Documented his intended changes and produced a three-bullet-point management summary
d) Got "Project Scorched Earth" signed off by his line manager (Before their unfortunate, fatal fall from the collapsing fire escape).
e) Engaged a highly paid consultant (also on the fire escape) to execute the plan
Then, assuming there were no meddling kids or a pesky dog nearby, he might just have got away with it.