Four years ago, I joined graduates.com (the name is self explanatory), but my profile's been dormant ever since. 

So today, I just did to it what I did to my then Hi5 and Zorpia accounts, i.e. delete and get rid of them.

Just in case you need to do the same, here is the link: graduates.com/ProfileRemove.aspx

You have to login first with the username and password used to register the time you opened the account (follow instructions on the site in case you forgot your credentials), then you will be presented with a window (see screeshot below) to complete the deletion process.