levo - 12:11 am on Sep 19, 2013 (gmt 0)
If you have a 'good' website, using Adwords shouldn't be a problem.
You should first check your website for compliance with the Adsense ad placement policies. Do you have any social buttons or plugins that covers the ads when clicked/mouse over? Or do you perfectly align and color match ads with content which might confuse users?
There has been some talk that a new algorithm checks your website and determines if the click is valid or not.