Many usability abominations have been inflicted on us in recent years, but I think one of the worst is embedded scroll bars in web pages. I usually scroll with my mouse wheel so it's especially annoying to be scrolling down and have a frame with a vertical scrollbar scroll under the pointer so that it starts sucking away the scroll events. It's also annoying if you're actually interested in the contents of the frame, since you have to cover up part of the text that you're reading with the pointer in order to be able to scroll the frame. Ban embedded scroll bars now! (Yeah, I know - I should use an open source browser and reprogram it myself to remove constructs that I dislike...)