WOT tells you how much people trust websites. If you disagree with a reputation, you can rate the site yourself. If you own a website that you feel is rated unfairly by others, here's what you can do:
http://www.mywot.com/faq/website/reputation-problems#misrated
You may also want to read this to learn more about why ratings are not easy to manipulate:
http://www.mywot.com/wiki/FAQ#Reputations_are_easy_to_manipulate