I second that. And third it etc.....
Often there is no way to shut it up either, other than close the page.
I was actually looking for something similar when I found this thread: does anyone know how you can completely stop a page loading?
In specific I mean can you stop a Myspace page when all the text has loaded and not have it go on and download plenty pictures, slideshows, videos, glittery things...... when all you want to do is find out who this person is.
The stop button only stops some of it, blocking java/script sort of works, but too many things need it.....
And add to what kaon wants.... can the sound be blocked?