Reading this finally made me figure out how to turn this feature off (to be fair, it was quite straightforward). I find it extremely annoying when there are always things popping up over the text you are trying to read.
I will admit it's very weird to watch, but it helps my ADHD concentrate.
Also, when scanning a page looking for info and links, I seem to both read and keep the mouse pointer somewhere close to the center of the window, increasing the risk of annoying pop-ups. (Moving the mouse too far away often causes the wrong thing to scroll whey you use the wheel, perhaps not on Wikipedia but on many other sites.)