Serving advertisements based on the context of the page is all the rage in Internet Marketing. It is a very useful tool and can be proven to be very effective. However, I just came across some pretty wacky contextual ads that are obviously not appropriate. Below is the screen shot of a CNN story from Canada where a woman finds a severed foot washed up on a beach. The corresponding ads which appear are pretty inappropriate in my mind.
A larger image can be found here.