It's been a long time since Bad Ad Placement Example 1, but it's been a goal of mine to post more regularly about this kind of stuff. Badly placed ads can be simply in bad taste or catastrophic, among other things. I would say the two below appearing on the same page as a story about Osama bin Laden's burial at sea would fall in the funny and gross categories, respectively.
Win a Catch of a Lifetime
Half Off Fish and Chips
As a side note, it is a little weird that I always seem to notice this type of thing more often when the topic is serious like the two listed above.
Source: Video of bin Laden's sea burial to be released?