I hate text web sites that "autoplay" their next piece of content. So when you reach the end of an article, the URL in your address bar spontaneously changes to a different URL, and instead of having reached the end of your article and the bottom of a page, you're instead suddenly at the beginning of a second article which you never intended to read...

CNN also does this with video reports. If you want to rewind to hear the end of the video -- you can't, because you're now instead watching an entirely different video.