Mojo
Mostly harmless
Nor would it matter if they were. The trope that Americans don't get British humor is as stereotypical as ships always turning turtle and floating for hours. British humor has been consistently popular and normalized in the U.S. for at least 50 years.
No, it's a desperate ploy (identified by Mojo too) from Vixen to pretend she's the only one who can properly tell which parts of the joke article are factual and should be taken on the authority of Finnish satirists, and which are the joke parts. Sure, we all recognized it as a joke, but only Vixen can properly tell us what the true parts are.
Only Vixen failed to identify it as a joke.