How to Report Keyword Stuffed Sites?

I am very much irritated by those sites that do not have any useful information but just stuffing keywords in their pages to rank well in Google. These sites are ruining the search results as I have to go to third or fourth page in the search results to get good information on what I am looking for.

Many webmasters say that keyword stuffing is a blackhat SEO kind of technique and should be avoided. But there are lot of idiots on the internet who are doing this happily and ranking well in Google search results. I wonder how this can happen. Why are these sites not penalized? Is it because they have backlinks or something?

Assuming that search engines may not have enough time to take care of these sites, I want to do something to report them to search engines. Please tell me how to do that.

For example, look at the below link. It is all junk. I am not putting any link because that will pass PR for that. You can see the first two paragraphs of this page in the below quote. Is it not keyword stuffing?

__________________
My Blog About Interesting Things | Raju at Bukisa | Writing at Bukisa