Ad Placement Fails Part III

I'm sure you've all seen them.  Ads placed beside news items that are really not "fitting".  The ways it works is there are ad areas surrounding news items.  The ad that is supposed to appear should, in some way, coincide with the news article.  eg.  a news item on getting your pets their rabies shots might have and ad for a local vet.  These ads are placed by using a computer algorithm and sometimes the results are not what was desired.