Name few Black Hat SEO techniques?

[michaelclarke]

Link Farming
Hidden text, etc.
Gateway or Doorway pages
Cloaking
Keyword Stuffing etc..

[bobnelson]

Duplicate content is black hat seo.

[gulshan rana]

There are few Handfull Black Hat Seo Techniques.

1. Duplicate Content
2. Spam Comments
3. Duplicate Content
4. Cloaking
5. Article Spinning
6. Doorway Pages
7. Invisible Text

[dpmiindia1]

According to me Now a days havey bookmarking submission , directory submission is called black hat seo.

[ajay49560]

Black Hat SEo Techinque.....

Content Automation
Doorway Pages
Hidden Text or Links
Keyword Stuffing
Reporting a Competitor (or Negative SEO)
Sneaky Redirects
Cloaking
Link Schemes
Guest Posting Networks
Link Manipulation (including buying links)
Article Spinning
Link Farms, Link Wheels or Link Networks
Rich Snippet Markup Spam
Automated Queries to Google
Creating pages, subdomains, or domains with duplicate content
Pages with malicious behavior, such as phishing, viruses, trojans, and other malware

[sadianisar]

Keyword Stuffing
Duplicate Content
Spun Articles/Blog
Doorway pages
Cloaking

[clovisjobin]

There are few Handfull Black Hat Seo Techniques.

1. Duplicate Content
2. Spam Comments
3. Duplicate Content
4. Cloaking
5. Article Spinning
6. Doorway Pages
7. Invisible Text

Yes am agree with you.

[ritika.patel]

1. Cloaking
2. Paid Link
3. Door Way Pages
4. Broken Links
5. Copyright Content
6. Keyword Stuffing

[buysellmarket]

black hat techniques
1. doorway page
2. hidden link and text
3. redirection
4. cloaking
5. keyword stuffing

[TinaLewis]

Black hat SEO techniques-
Cloaking, Link-exchanges, Duplicate Content, Buying Links, Keyword Stuffing, Hidden text, Link farms, Over-optimization.

[ShreyaKoushik]

These are few black hat SEO techniques -

Use of doorway page.
hidden link and text.
Cloaking.
Link-exchanges.
Using plagiarised content.

[StelaBrown]

Theses are few black hat SEO techniques -

Doorway pages.
Cloaking.
Hidden Text or Links.
Keyword Stuffing.
Sneaky Redirects.

[Nexevo Technolo]

Duplicate Content
Cloaking
Article Spinning
Doorway Pages
Spam Comments
Duplicate Content