Earlier quoted context omitted.
The author uses quotes as actual quotes instead of as scare quotes. I'm not a fan of "scare" quotes so I'd be very pleased if other journalists did the same even if it takes some getting used to.
I use "(!)" when I mean sarcasm: > Expert (!) hackers used... I hope then it's clear they are not experts really and when I say "experts" it's clear that I'm just quoting.
On the other hand, using quotation marks to indicate sarcasm or irony is normal use and is in style guides.
You just have to rely on context to differentiate. The headline of the linked article is pretty ambiguous and like GP I read them as sarcasm. I think it was a poor choice to include them at all in this case—they don't add anything to the headline.