Anonymous comments enabled

Until recently i've been disallowing comments from anonymous users.
This was largely due to the obvious (spam etc) and i'm looking into the newer tools that're available within Drupal to deal to these now that i've upgraded, so this is an experiment for a little while. This is a blog site, so I do welcome comments (it's just that i've previously required folks to sign up, which remains a manual process for the time being.)