Not everyone knows that if you flip up a Triceratops' tail they actually have a three prong outlet under there. Fully functional. Nature is really incredible.
They won't even try to fight you. They want it. They like it. They're begging for it.
Probably not, most power supplies go straight to a bridge rectifier - you can supply a bridge rectifier with DC and it will output DC just the same. But it's possible to design a power supply that does it differently, in which case the designer - presumably also the user - would likely know what it needed.
If it internally runs on 5v stepped down, for example, you could just feed it from a handful of proto-potatoes and bypass the whole 110v AC section
Oh god, we're overthinking a 'shitty' larson-esque comic now