You know, I'll probably take some heat for this, but, here goes...
We've reviewed over 200 websites in the last 30 days. All of those websites have been indexed by two or three major link communities. We've visited those resources multiple times following backwards links and have come to one conclusion...
They exist solely for the purpose of inflating link popularity.
We are not saying that all link communities fall under this category, but 9 out of 10 that we've visited do!
We've also come to another conclusion. There are two types of SEO/SEM consultants...
The first are those who know what they are doing. They develop quality campaigns that are targeted for the client.
The second are those who do not know what they are doing. They develop poor quality campaigns that are not targeted for the client.
We'd like to see the Internet free of this type of practice. Its unfortunate that all of us are being indexed by these resources and included in their databases without our permission. I'm sure there are some who have developed a robots.txt file to keep most of them out. But, that would be a chore in itself, there are hundreds of thousands of these resources and most are junk!
We feel that being indexed by these resources has no bearing (good or bad) on your link popularity. Any major SE is most likely filtering out these references.
Its not a numbers game anymore! It's now all about quality, and really, it always has been. I think too many companies have been caught up in the tricks of the trade and are now finding themselves having to rethink their strategies.
We hope that anyone reading this thread will take it to heart and focus their energies on improving the quality of the web. With all those billions of documents being indexed, there are billions of pages of junk! It sure would be nice if we can help contribute to the sanitation of our back yards!