Search Engines WEB writes “from yahoo and stopbadware.org
Google has begun alerting users whenever they click on a search result that may take them to a dangerous Web site. … according to an announcement from The Stop Badware Coalition, which is collaborating with Google on this effort.
When users attempt to click over to a Web site considered to be potentially dangerous, Google shows users an alert page that informs them of the possible risk and gives them the option to click back to the results page or continue on to the questionable Web site.”
bad pages checker
I found interesting online checker, what use Google for detecting spyware on websites: http://checkpageforshit.com/