I think a professional headline would usually just lack the comma there. Headlines typically have weird phrasing (due to their terseness), but they’re generally still grammatically sound.
I think “HackerNews owner hacked” would be a headline, rather than “HackerNews owner, hacked”.
“Have I Been Pwned owner pwned” seems to be on par with “Headline English” to me
MMOs are probably a good indication.
I think researchers (or just casual investigators) studied MMOs to see how people might react in a plague situation (I want to say WoW, but it might’ve been EverQuest).
They ended up discarding/writing off their findings because they figures that there wouldn’t ACTUALLY be trolls who’d go around spreading the virus on purpose, and also that because the virus only had negative effects, no one would be doing actions that would nearly guarantee infection.
Of course, 2020 showed us that we really should’ve been looking at what people do in MMOs…