Black Hat SEO Techniques:

1) Link Manipulation - Buying links, advertorials, and link schemes
2) Article Spinning
3) Link Schemes
4) Link Farms
5) Link Wheels
6) Link Networks
7) Rich Snippet Markup Spam
8) Automated Queries to Google
9) Creating pages, subdomains, or domains with duplicate content
10) Pages with malicious behavior, such as phishing, viruses, trojans, and other malware.