On a daily basis I hear people getting banned from adsense for one reason or the other. Here are some facts I have gathered to keep your account safe.
1. Don’t brag about your adsense income, unless you are some big time publisher like Markus, ShoeMoney, Amit or JimKarter. It seems Google give their top notch publisher some-unpublished-security from click frauds and probably they have a warning system in place for them unlike newbies who are banned from the program without warning,
2. Never ever touch the ad code. In rare cases when you have to do that, clarify with adsense support whether it is legal to do that. A couple of times I wanted to do that. First time they told yes but in second case I was shown the red flag. Though I was sure that in both cases, I wasn’t doing anything that could hurt adsense “system”.
3. Though Google does not ban you for creating ad impressions. But yes it may ring an alarm bell for a large no of impressions. This could be possible if you are operating a forum. Forum tend to have a high page impressions to visitors ratio. You can easily write a script whereby the ad would not be shown to you or any moderators thereby saving you from false page impressions.
4. Get a click monitoring software like asrep. In an unfortunate event when you get kicked off for no obvious fault of yours, you should be ready to show the click logs. I have found this software to be pretty good and moreover —as the site claims— it is approved by adsense.
5. Newbies to adsense have a tendency to fool this system, probably undermining or unaware of Google’s tracking and would go around cyber cafes/friends places and click their own ads. NEVER EVER do that. This is not to scare you but to let you know that Big G has some solid systems in place.
Related Post: How to test adsense ads without any fear of invalid impressions?