I don’t do a whole lot online that really warrants anonymity, but I still don’t care for the idea of being watched. Further, I’m no fan of the growing trend of linking logins, such as the ubiquity of Facebook, or of browser tracking. Just because I’m not doing anything wrong doesn’t mean I don’t want privacy. Regardless of the existence of darknets and freenet I don’t think there’s a way to really hide online if the right (or wrong) people really want to find you – but there are definitely ways to make it more difficult.
There are other paid options for online anonymity as well as TOR – which is almost unbearably slow in its default configuration, not to mentioned riddled with its own dark corners and dangers – but the above represents the easiest free as in beer way to cover some of your tracks online.