Journal: Mouseovers - as bad as popups?

Is anyone else as annoyed as I am by words and phrases in web articles that pop up boxes because my mouse pointer happened to cross them, temporarily hiding the content I was reading in the first place? I didn't click on anything, and consequently, I don't want a context change. I find these annoying to the point of noting what the site is and not going back. Anyone else feel the same? Anyone have a defense of the practice?