Whether black hat is not good but in many cases to apply the black hat site you can Google topped

You only have to look at Googles guidelines which says:- Quality guidelines - specific guidelines
�Avoid hidden text or hidden links.
�Don't use cloaking or sneaky redirects
Using these and any other black hat techniques will get you sandboxed or banned, is it worth the risk?

1.The most commonly used, but also the most practical, it is estimated that means black hat search engine is difficult to distinguish - bulk Link.
2. blog with AD soft paper
3.The so-called "smart jump"

The way I see it, is that one is spamming a certain websites.