Script Summary: Avoid useless search results in Google by filtering out hits that lead to sites that sell stuff.
I wrote this since I was fed up with searching for information about products and only getting search hits from web pages trying to sell the things to me.
I hope that someone else can get use out of it.
As it is today, the script doesn't remove filtered links, but instead right-aligns them. That way it's easy to distinguish between filtered and non-filtered matches, but no information is lost. This can easily be changed to removing the link completely, the required code is currently commented out.
If you have any suggestions for how this could be improved, please tell me. An idea I had was to add functionality for easily building your own database of filtered pages, for instance through a right-click option on links. This should be done as a proper extension though. The lists could furthermore be automatically shared and updated etc... this all makes it very similar to Adblock and the Filterset.G Updater. Perhaps integration would be beneficial.