Google Ad Sense

I have to say...I think google ad sense is a hoax.  You sign up, put the ads on your blog, and tell your friends to start clicking.  Well, my friends, you clicked!  And I was up to almost $50 for the month and I got an e-mail yesterday saying that the disabled my account for inactivity and that I can't use it anymore and that I wouldn't be getting paid.  They are refunding the money not paid to me yet (I haven't received my first check yet) to the companies that paid for the ads.  Hmm....kind of hoaky isn't it?  I think they did this because they didn't want to pay me!  And they did it to one of my friends as well.   Has anyone else had this happen? I'm extremely dissappointed!