Stick the National Geographic Environmental News Feed into your favorite feed reader. You will not have to wait long to see "how not to" incorporate ads into your feeds. First off, it does not give you the whole feed. You get an ad, a headline, an ad, a headline, etcetera... If you click on any of the headlines (those are the single lines in between the ad feeds), you will also see how to make me hit the unsubscribe button.
The first thing that happens is you are greeted by this screen-sized advertisement. It will take forever to load, be nothing related to the subject of the feed and, almost certainly, annoying. Thank God for bloglines unsubscribe button.
