What is Google doing with dofollow spam comments?

[designer pro]

I have seen it time and time again. Crappy, no value websites entering the top ten for competitive search terms solely from buying a bunch of do follow comment links.

Granted, these sites tend to only rank high for a few months and then drop, there has to be a better way to control this.

One example. There is a site ranking top 3 for 3 similar VERY competitive search terms. All of their links are from comment spam. These pages also have a bunch of other comment spam links for casinos, viagra you name it. Yet the same still holds its PR and allows these sites to rank because of it.

This one particular site doesn't seem to even have any other links besides these blog comments. Not to mention that most of these blogs are not even US based and the site itself doesnt even work!

Google has so many detections and trip wires in place, you would think something like this would be easy to prevent.

Another thing I see a lot is a site ranking from a bunch of hidden links. I know I would be able to code something myself that can detect a hidden link on a page, why cant google?

Hopefully these are things that will be fixed sooner than later.

It just saddens me that my clients work so hard to get high quality relevant links from networking, communicating etc and then some site that has no business outranking them does.

I always tell them though they are in this for the long run and these sites will come and go meanwhile their site will always be remain steady because of quality.