Rant incoming - sorry it's been done to death already but I never weighed in before. I will never understand the desire to mess around with custom scrolling on a "normal" page. If you have one of those weird parallax-scrolling visualisations that news sites are often fond of, fine - I don't like them but I understand it's there to present some photography or graphs or whatever in a novel or fancy way. But so many sites that are just serving an article with some pictures override a browser's scroll behaviour in a way that not only adds nothing, but often breaks things. By that I mean it can either just slow or interfere with scrolling in a way that will annoy technical or observant users ... or it can prevent scrolling altogether for a subset of browser/OS or for touch/non-touch users.