67 votes in 13 minutes? I've never seen anything shoot to the top quite that quickly. There's a surprising disparity between the number of people who click a link and the number of people who go back and vote.
Hummm probably, with your username, loads an iframe from HN (thus giving access to your logged in cookie)... and GETs or POSTs to some page, something like:
14 comments
[ 3.8 ms ] story [ 35.1 ms ] threadp.s. He's done interesting visualizations before - I'd suspect something else first.
Guess my benefit of doubt was unwarranted: http://news.ycombinator.com/item?id=518752
GET /vote?story_id=12345&username=inerte