Chief officer of the Tinfoil Hat Brigade. I mean, cell towers use microwaves. They fry your brain, man! And they carry mind-controlling signals! Or maybe he’s an extremely ardent lover of music and is just fed up with the interference.
Later stories suggest that he had worked for Telstra (the Australian telecommunications company) and had suffered an injury. It seems he was fixated on the effects of the radiation from the mobile phone towers:
Not perhaps the most stable personality to have access to a tank.
“APC” used to be used in Australia for a combination of drugs that was available over the counter and very commonly used: aspirin, phenacetin, and caffeine.