Hmm... I am concerned that the big solar flare might come one day and usher the world into a new dark age... or at least a victorian period of about 20 to 30 years.
If you need internet ensure it's connected outside your faraday cage, run the Ethernet through a surge protector (with the modem or other devices power supply, which is essentially just for kicks at this point) and run the Ethernet inside the cage and connect it to a wireless router powered from outside. Connect all computers via wireless and your systems will be safe.
However, if everyone elses shit dies, your screwed as it is. You'll be one of the only people trying to connect to HN.
It is silly for those people to be worried about WiFi, but some just don't have a clue as to the differences between ionizing radiation and electromagnetic radiation (and the importance of power levels). But the same folks will gab with a cell phone against their heads...
The thing that frightens me the most is the areas I personally exhibit irrationality in that I don't know about. I'm actually OK being irrational if I know I am (I can make decisions taking that into account), but I have little doubt there are places that I don't know, where I make stupid decisions.
In the meantime, we should all turn off all our electric devices, wrap our houses in faraday cages, filter all of our water, and wear respirators. Wouldn't want to be unsafe, now would we?