I've been doing some research on websites because I'm making my own and a few for others. One of the most annoying things that I have been seeing is the advertisement at the top of the page taking over the whole screen even though you didn't click on it. It's not always so bad but when it's a horror movie and happens to my brother, it scares him and he can't get out. I don't think advertisements should be so aggressive. So what annoys you the most on websites?