AdSense is notorious for banning publishers from their ppc program. 95% get banned because they try to earn money online with AdSense by breaking their TOS. Most of them think they can fool AdSense but at end they loose their account. Earn money online or offline by fraud. Many simply getting banned because they don't bother reading the TOS and do wrong things without knowing. AdSense doesn't take this as a excuse. If you don't read the AdSense TOS then its your fault they don't forgave you for that.

Still if you want to earn money online without risking your AdSense account then its better finding out what are the things which would led to get your AdSense account banned.

• Do not click on your own Ads. You can't out smart Google.
• Don't let your family or friends to click on your ads.
• Make sure you understand everything TOS says. Read it 5 times.
• Use legit traffic. Search engine traffic is only thing 100% safe.
• Don't use content-targeted advertisement on the same page.
• Don't encourage anyone else to click on ads.
• Don't put images to look like those are part of ads.
• Don't try to edit their Ad code.
• Make sure you have right traffic to right niche. Teen forums not work for Loan sites.
• Do keep your AdSense stats private.
• If you have doubts about site content simply don't use AdSense ads for it.
• Don't blend ads too much with content or make they stand out too much.
• Don't use Porn, Survey, GPT, PTC details or info or ads in your sites.
• Use a Google analytic account so you can show proof about yr traffic.
• Don't Spam to promote your site.