Unfortunately without advertising this site would fold, so it's a necessary evil. My aim is to place it, but without interfering with site use, and I don't think those ads do. In fact those 3 ads on the forum index have been there for years now, but just not as obvious as that.
I'll take opinions of course, but I don't see those ads as causing any usability problems and there is a solid argument that if you don't like them, don't click on them.
Actual pop-ups would be a different matter. They are bloody annoying, as are those hyperlink words that have ads in, or advert posts in the middle of threads as some sites do. Therefore we don't do that. I hope we've got the balance right.