If the article mentioned actual business metrics or trends out of which I could make a business, it would be perfectly relevant and I wouldn't have much of an issue. There is a lot of business opportunity surrounding pornography. As it is, it's just a top 10 list of porn sites, Which is one step from being a link site. This makes it off-topic at best and offensive at worst.
Some people want to avoid pornography for 'moral' reasons, others aesthetic, and some are just married. I think that it is in the best interests of HN if we avoid alienating these people.