There is a new trend in town, and its traffic faking. It happens two ways. The first traffic-faking scenario is when a website has Google Adsense on it, and Google pays per page impressions. The pay for click is pretty good, but Google has ways of detecting fraudulent clicks. However they pay a penny or two for a certain number of page views, and this is what traffic faking targets. It is relatively easy to spoof unique page views, but a heck of a lot harder to spoof the controls that Google puts in for fraudulent clicks. So this type of traffic-faking hits as many times per hour as programmed, and the pennies add up for page views.
The other type of traffic faker is aimed at people who check their web analytics. For example, I have a blog based on philosophy, and I noticed that I was getting referrals from an ad-laden website peddling tooth-whitening products. It appeared that they had a referring link to my blog. As it turns out, I went to the page, and there was no link. They generate traffic to their pages through sheer curiosity.
On another one of my blogs, a company selling colored toilet paper used a traffic faker. I usually go to their websites, and hit the contact button, and used terms related to lower anatomy and sphincter muscles, and tell them forcefully to stop traffic faking. I don't know if my scatological references really work, but it makes me feel better.
One would think that the smart people at Google would work out a traffic faking filter. I think that I will go and ask them to do so. I will let you know what they say.