I always thought popup ads on the internet were obtrusive enough, but these new flash ones that cover all the content you're trying to read, and hide a tiny 'x'

I always thought popup ads on the internet were obtrusive enough, but these new flash ones that cover all the content you're trying to read, and hide a tiny 'x' or 'close' button somewhere take the biscuit! Any site that features those should feel ashamed.