I love the article, I actually tinkered with something like this a few moths ago.

I tried to navigate back to HN using the back button, however it was inoperable. I found that passing every section heading on this article adds a line in your browsing history. Please don't mess with my browser history while I'm just scrolling. If I click on something that's fine, but not while I'm scrolling. I already have a history of where I am in your article, it's called the SCROLLBAR!