There is a link right there in TFA that explains what happened to the bus. The bus was not your Audi. It did not spontaneously combust. The bus was involved in a conflict that was a hot-button issue even back in 2011, and the quoted headline "Bus Blows Up in <CITY>" was blatantly excluding information. Language exists in context.
When the commenter above says "functionally passive", he is getting at something that lies outside of any strict grammatical sense. It is not a matter of ASTs, IRs, or anything of the like. It might be less confusing to phrase this as "spiritually passive". We're using "passive" not in the technical sense but in the normal, colloquial meaning of the word.
Normal people often use the grammatical term "passive voice" to casually mean "this sentence does that 'passive' thing where it omits key info about agency and responsibility". This casual usage makes a lot of sense, because the technical "passive" is our most useful tell for the spiritual "passive". Granted, anyone who takes a moment to think it over can see that there are counterexamples, and that this tell is merely a loose correlation, not an ironclad correspondence. Normal people are okay with this sort of situation.
Pedants are within their rights to be annoyed by this usage (and perhaps genuinely confused, though I doubt that this is common). There is certainly no law against being angry or snide whenever a word has multiple, related meanings. But TFA is just plain wrong when it claims that the passive voice "has nothing to do with lacking energy or initiative, or assuming a receptive and non-directive role." It is entirely related -- by correlation. Correlations are not foolproof logical rules, but people can see them and use them.
Moreover, normal people can see when Orwell or Strunk & White point out a correlation. They can read intelligently to understand what Orwell and Strunk & White really meant, and how it applies to actual headlines and sentences. And finally, they can read Pullum here call Orwell's essay "overblown", and decide for themselves whether Orwell is overstating the dangers of official language, how it can serve to dehumanize and deflect, or whether, more likely, Pullum is overstating this stupid nitpick about what "passive voice" ackshually means.
I'm not appealing to them out of nowhere. I'm rejecting Pullum's dismissal of them at the end of TFA. You can learn a lot more from them, than from what I've seen of this blog.
As to this new link...what a load a willful misrepresentations. Misses the point entirely. The rules in PatEL are not literal laws. They are merely pointing the way toward something.
For example, from the very top:
> So, Orwell writes "it is generally assumed", which is passive. Why didn't he say "people generally assume", or "we generally assume", both of which are perfectly grammatical...
Beaver's proposed variants are also passive, spiritually, in my sense above. Who is "we"? A good author chooses between these not based on which one is literally passive, but on other considerations like flow and sound.
Maybe there are Orwell fans out there who have read PatEL too literally, and need to be disabused? Maybe this blog is good for those kinds of people? But from what I've seen so far of LL, it's a bunch of smug dunks that nobody asked for.
Fair enough! I'm just saying it's one of the notable beats LL has, is poking holes in Strunk and Orwell.
I suppose I can understand the impulse. It's fun to tear down idols, and sometimes necessary.
As I said in a different comment, I'll try to come back to LL with an open mind some other time, hopefully on a different topic.