All we need to know about White Hat SEO, and it is for our own cause. But is it correct that, the opposite of "White Hat SEO" is Black Hat SEO or Negative SEO or does it include "hacking" or some kind of things to malicious website?
What Hat SEO & Black HAT SEO (slangs respectively) are based on Individual interest to optimize their websites. These are done from our side only. But whenever someone who is not intended to -starts creating links, optimizing our websites with overly optimized anchor texts, unwanted redirects, unsolicited blog & forum comments with our URLs as hyperlink (other SEO methods too). It's called Negative SEO.
Well, it is true that negative SEO is a black hat SEO. Negative or Black Hat SEO refers when one involves in buying links or use tools to build links in order to reach competitor website. In other words negative or Black Hat SEO tactics involves creating links via tools, buying links, etc. to catch competitors and ranking itself in the Search Engine.
Negative SEO typically refers to one of a few different techniques designed to drive down the page rank of a competitor. Black Hat SEO is more frequently used by those who are looking for a quick financial return on their website rather than a long-term investment on their Web site.
Negative SEO attacks can come in a few forms. Generally, negative SEO refers to when one website buys links and points them at a competitor’s website in an effort to torpedo their rankings.
Spammy link to targeted website can cause ranking lost. Google webmaster have a choice to exclude negative link that website owner do not do on their own.
Example of Negative SEO would be spamming your links on forums, and such to build backlinks. However, this can lead to being blocked on google.
Black hat SEO according to Google is any linkbuilding at all pretty much as all links should be earned and not built according to Google's T.O.S.