I have no issue with ads on the site under the idea of making enough revenue to keep HB operating, but a number of topics have ads in the middle of threads, and that's a bit too intrusive. Top of the page and along the margin on the right is fine, because it doesn't interfere with the actual use of the site.
Also, ads reloading at the top of pages are shifting/scrolling the page; it's terribly distracting when attempting to write a post, particularly when the page scrolls past the reply box.