I do, however, think that if there was a more widespread scorched earth approach then the issues like those mentioned in the article would be much less common.
Fortunately, real network admins are smarter than that.
Yes, there are less scorched-earth ways of looking at this, but this works for me.
As always, any of this stuff is heavily context specific. Like you said: network admins need to be smart, need to adapt, need to know their own contexts.
Sure, I'm usually on hotspot, but I personally appreciate when businesses have wifi. Either way, there are always going to be shared networks somewhere.
IP based bans have long been obsolete.