OK ... ads pay for site so it is free - so ads most likely will not go away.
anyone who will pay for its add to be posted on the site - wants it seen!
so ... most likely they will stay on the top.
but! where there is will there is option to do dirty deeds while others watch; for example - use FireFox instead of IE and than under the Tools - Options - Web Features - (click OFF) Load images:
ta-da: