I noticed the following comments under a hot meta post: Downvoting questions from new users
I agree this is horribly bad form. I blame the Australians. – Andrew
But @Andrew, as you yourself pointed out, there are no Australians here. – StoneyB
@StoneyB No, actually I said I never see them. They could be all around us, waiting in the trees like downvoting drop-bears, whispering, "Strewth, she's a beaut isn't she!" when they see their next victim. – Andrew
At first, I thought these comments to be rude and offensive, yet the upvotes suggest that they are not. I guess it's a well-known joke, but searching "blame the Australians" online didn't give me any useful information.
My question is: Why are Australians blamed?