I think it's pretty ridiculous. It's only going to amount to a few cents or dollars here and there, and it could quite easily get your account banned. Google make the majority of their money through AdWords/AdSense, and you can bet that they are going to be doing their best to protect that.
And of course, ultimately it just makes it all worse for everyone involved. These fake, insincere clicks are not going to result in conversions for the advertisers, yet the advertisers have to pay, and so in future those advertisers will reduce their advertising budget or stop playing the game altogether. Click fraudsters are diluting the value of online advertising for a petty little short-term gain.
So yeah I don't like it!