Earlier quoted context omitted.
How is your poxy little 3 kVA portable genny going to power the local network without tripping its own breaker?
It genuinely does happen. I can't find a summary of how often, but if you Google "lineman electrocuted back-fed generator" you can see a bunch of cases. It's not enough power for everyone in the neighborhood to have power, but it's enough that the lines have thousands of volts in them when the utility company thinks they're dead. The amps are low, but enough to be lethal.
Yep, 50 to 100 milliamperes can kill, all you need is enough voltage to overcome the resistance of human skin, which is 1 million ohms when dry and a few tens of kohms when wet.