You think Google can't detect this? Enough advertisers have conversion tracking that Google can detect if a person is clicking a zillion ads and never actually converting, in addition to the other multitude of ways they detect fraud. I'm sure in the battle between fake traffic producers and Google there are probably tricky ways you can fool Google, but a person clicking every ad is not one of them.
Also... this doesn't actually hurt Google. If the percentage of fake traffic goes up, the cost per click will just go down over the long term. And what, advertisers are going to lose faith? Give me a break. It doesn't matter if the traffic is 0% fake or 90% fake, all that matters is if the traffic is making you a profit or not.
Also... this doesn't actually hurt Google. If the percentage of fake traffic goes up, the cost per click will just go down over the long term. And what, advertisers are going to lose faith? Give me a break. It doesn't matter if the traffic is 0% fake or 90% fake, all that matters is if the traffic is making you a profit or not.