Why your adsense account can be disabled

Why was my account disabled?
Lastly, Please read first Terms and Conditions, Google will use its sole discretion when determining instances of invalid click activity.

Some reasons that I have just known after reading different blogs/forum threads related to adsense account issues. You will know how/why/what exactly Google does not allow.

1. No Policy Privacy
2. Copied Contents & Images
3. Profanity – Porn – Guns – Illegal Stuff
4. Clicking your own ads
5. Encouraging a friend to click your ads
6. Asking readers to click your ads on a forum/blog by placing a banner “Click here” or “Support us by clicking my ads”….
7. Writing about a subject of which you have no idea what you are talking about.
8. No ‘Quality’ contents.
9. Spamming your web address/URLs on forums/blogs/youtube.
10. Starting 50 twitter sites and placing your Adsense site links
11. Making Youtube Videos asking people to click your ads
12. Exchanging clicks with friends or a group of adsense publishers.
13. Posting your non TOS Adsense webs site on the Adsense forum
14. Asking stupid questions in the Adsense forum and drawing attention to your site
15. Using Adwords, Yahoo, Bing etc.. to drive traffic to your site
16. Placing adsense on your site with Free Games/images you do not own.
17. Using Adsense on a site that is not finished/under construction/no contents at all.

There are many other reasons that your adsense account can be disabled. You should know all of them or at least the most popular reasons in order to protect your account from termination.