Black Hat SEO is considered an illegal form of SEO. Here are some of the reasons why Black Hat Search Engine Optimization is illegal and treated as misconduct:

*Black Hat SEO methods does not follow search engine rules and regulations.
*It is friendly only for search engine crawlers (bots and spiders) but not for the human audience.
*It directly affects the userís browsing experience.

Some people say that Black Hat SEO used to be legitimate. a lot of SEOs have gone overboard and overused these SEO methods to boost up their rankings and to further monetize their sites. Now However, Black Hat SEO gives only temporary results, since they are immediately penalized upon detection. So, spammy sites that look for short-term gains are lessened.