How to get Adsense banned

1. Commit Google Don'ts
The first thing to avoid is any of the Google Don'ts. Cloaking, keyword stuffing, and title stacking are all ways to get banned from Google searches. They're also ways to get banned from AdSense.
When you place AdSense ads on your site, your site is far more visible to Google and it's much more likely that your rule breaking will be caught.

2. Click on Your Own Ads
No matter how tempting, never ever click on your own ads. This is probably the easiest way to get your site suspended or banned. It's a form of click fraud, and Google is very good at catching this, even if you think you're hiding your tracks.
Don't let anyone who uses any computer in your home click on your ads, either. Make sure your significant others and children are aware of the rules, or you could jeopardize your standing with Google.

3. Hide Your Ads
It might be tempting to hide your ads by making them the same color as your background or camouflaging them on areas with busy background images. You do still get paid for pageviews, so invisible ads would still pay, right? Don't even try it. This violates Google's Terms of Service, and it's easy to get caught.
Don't stuff your ads far below the rest of the content, either. Clicks pay better than pageviews, so it's to your advantage to have your ads prominent. Try to make the ads look like they belong on your page.

4. Beg for Clicks
Don't hold ad-click contests, beg, or even give big hints that people should click on your ads. They can ban you if they catch you begging for clicks anywhere on the Web, including pages that are totally unrelated to your AdSense pages.
Google also forbids labeling your ads with language stronger than "sponsored links." This is really for everyone's benefit. Pages that beg for clicks are usually not great reads, and pity clicks don't help the advertisers.

5. Alter the Code
AdSense generates javascript code that you can copy-and-paste directly into the HTML of your Web page. If you need to change the color or size of your ads, generate new code from AdSense. Don't make changes to the code from your Web page editing program or tweak it by hand.
If you put AdSense in Blogger, Google will generate the code for you from within Blogger.

6. Use Robots to Click on Your Site
Never use any sort of automated tool to inflate your page views or click on your ads. This is click fraud of the highest order, and Google is very sophisticated at catching this. This is a trick that can easily get you banned.
Likewise, don't use human-powered schemes to pay for clicks, either. No trading clicks with other AdSense users, and no pay-for-clicking schemes. If advertisers wanted to pay people for clicking, they would have signed up for it themselves.

7. Tell People How Much You Earn Per Click
Google is very picky about how much you disclose about how AdSense works. They don't let you tell people how much you were paid per keyword, because this could jeopardize revenue from AdWords advertisers. Beware of anyone who offers to sell you this information.