I've moved your post to prevent further hijacking of the original thread and to answer a few things.
You mention ads, like most all forums ads keep the the bills paid. Infected/tainted ad servers? We use one ad server with 6 advertisers/agencies none of which are infected, while there maybe some ads that don't play by the rules by redirecting or causing popups most do not. Infinite page loads, this is an appearance issue because the ads are served through an iframe, appearing that the page is always loading, we do it this way so the forum pages do not wait for the ads to fully load. Voice ads these appear in the threads and are being weeded out when noticed. Starting tomorrow there will be some new ad "rules" implemented that will reduce ads according to participation, so those that do contribute and contribute more will see less to none.