Basically every single big site screws this up when lazy loading content - Twitter, YouTube, etc. If I drag down the scrollbar to position content where I want

Basically every single big site screws this up when lazy loading content - Twitter, YouTube, etc. If I drag down the scrollbar to position content where I want it on the page, invariably content gets loaded and pushed to the page. Because I am fixing the scrollbar by holding down the mouse button, the page jumps to a new position. It is infuriating because this is solveable in many ways, the simplest being not to push during a mouseDown event. But my new most hated thing is Google lazy showing details when I mouse over a result. Which means if I quickly go to click on the second link I mouse past the first link and it expands to the space where the second link was, so I either click the wrong link or have to reorient and then click the second link. I can't imagine how or why that feature exists.