Sometimes such inadvertent juxtapositions are comic and occasionally they are embarrassing. The photo at the top of the post below and the news poll to the right that I just put up on the blog -- to illustrate the dangers of informal polling that is not truly random -- resulted in a juxtaposition that I decided to "undo" by adding this post because someone might think the juxtaposition was intentional and thus a bad joke.
But it was unintentional, which makes it a good joke. But if I have to tell you it was unintentional, that makes it a bad joke again.
Here's a link to a couple recent examples of iffy juxtapositions archived at newsdesigner.com.