Spyware, viruses, & security forum: Google and Bing search results links redirects: Virus or money-maker?

In the following CNET forum discussion people discuss if adwares that make search redirects are viruses or money makers.
 

Some of points to review

1. "Run a scan with AdwCleaner."
2. "you make your clicks and you take your chances"
3. "These annoying redirects are often add-on's to some program or feature that users download. They can often be avoided by carefully looking at the installation GUI as you install downloads. Often times there are check-boxes that have their defaults set to allow the installer to install additional items. You should almost always decline (not check) these add-on's."
4. "Read the installation and/or download GUI very carefully before you advance to the next page.
   (2) Select a custom rather than an express install.
   (3) Deselect or choose to decline when another program install is mentioned."
5. etc.