That's not really how WiFi works. Chances are his router is on the same frequency as the buses and he can fix this by changing to a different frequency. Even more likely (since one SSID shouldn't make too much of a difference) is that his WiFi router crashes at random and there's some amount of false causation there.
I know this isn't the beef of the article, but this sort of magical thinking that insists on forcing every little thing into a framework of a class war between the upper middle class and the lower/lower middle class is.