In reply to a post by kasg:

apart from the dire warnings on the front page - the bit that starts "The text below might uniquely identify you on the Internet". Of course, with a static IP address, then it will. Not a lot I can do about that AFAIK.

They're just warning you that your hostname shouldn't be something silly like firstname.lastname.co.uk. Everyone's IP address uniquely identifies them on the internet, unless they are using a proxy, CG Nat, a VPN or something similar.