I haven't been using it for over an year and want to delete all traces of activity as well as my email from their databse (so they dont ever email me saying tha

I haven't been using it for over an year and want to delete all traces of activity as well as my email from their databse (so they dont ever email me saying that they have released Digg version 13.0) and also if their site ever gets hacked, I'd rather not have any of my information in there.