A few things to keep in mind: some features doesn't work when you're a guest (or if you're a member but have forgotten to log in, dude...). Guests cannot post new topics nor polls and are only allow to post replies at 'The Bay' (and a captcha code must be typed in). They can't post at all in 'The Lab' and cannot access the users list nor the PMS (private messaging system). Since members can use the PMS, email addresses will be kept private and won't appear on your profile page.
The Homeworld's forums are restricted to Homeworlders although the Zen Garden can be accessed (in read-only mode) by regular members.
And finally, the golden rules, just in case you'd have reached the 8th one...: