@Needmoresleep - I think that article has built fake news around jokes and conspiracies on Twitter. I'd be happy to see JKR win a poll of Person of the Year, but the article is incorrect to say The Guardian were running such a poll. You can even click on the link they give, and see that the Guardian were simply asking readers to submit their comments about who they would choose for PotY and why.
I also don't know how that article can say "it swiftly became clear where the result was headed". Lots of JKR supporters said on Twitter etc that they would submit her name, but that doesn't tell us anything about what other names the Guardian were receiving.
At some point, the journalists were bound to close the submission form, so that they could write an article quoting some of the views, but I don't think you can read that as "Guardian pulling the poll" because they didn't like the result.
Maybe, Guardian will just pull the plug on the whole exercise or write an article and omit any mention of JKR - then we'll have something to complain about.