#BloggingTips: Do you know the difference between Black Hat and White Hat SEO? Here is a primer with details. Over the past 5 years I have notice an increase in Black Hat techniques (unethical SEO techniques) with the use of pornographic keywords for SEO to grow their traffic. (ie linking sexual innuendos to their blog, linking pornographic keywords & more). In the long run Black Hatters are caught and dinged by Google for using unethical practices.