The inclusion of the large graphic taken from a pornographic web site is not necessary (he could just write a single paragraph describing the potential to discover subscribers of porn sites) and shows poor judgement by the writer.
The style of the article was showing screenshot examples of relevant sites. That may or may not be the most productive use of screen space, however the porn screenshot fits in with the other ones.
Just to be clear, I think the inclusion of screen shots is an excellent use of screen space.
Screenshots are great; however, that particular screenshot could have been heavily redacted for the benefit of those reading in a professional environment.