I just asked FrumSkeptic about her yidsense ads, if she made any money and how well they're paying. She mentioned that google closed her adsense. I'm guessing this was due to someone trying to "help" her.
I was talking to one of my friends and mentioned to him that I have adsense and that they pay per click. Then I had to tell him in no uncertain terms that he's not, under any circumstance, to go to my blog and click on the ads.
If you think you're helping your fellow blogger by clicking on the ads, you're not. Google's not stupid. They monitor who clicks, from what IP, at what time and if they came from a search or directly. If they see someone clicking daily from same IP and/or who came to the site directly instead of via searching or even if by searching but from same IP or same IP pool, they will close the account and they will zero out the balance. Though your thoughts are appreciated, you actions are absolutely not.