Google Adsense has set many Program Policies which must be followed to use Adsense on any Website or Blog. If anyone not follows those Policies then he can get banned from Adsense. Some of the most common Adsense Policy Violations are following.
Using someone's else Copyrighted Content.
Using Unethical content on site.
Sale of Illegal Things.
Changing Adsense Code.
Using someone's else Copyrighted Content.
Using Unethical content on site.
Sale of Illegal Things.
Changing Adsense Code.