Eeek! My personal data! I have privacy concerns and am worried about spam too.

Number one: Don't Panic!

And answering your question:

We keep your email address so we can send you very sporadic emails, or contact you regarding your account. That's it. We don't bombard you with a zillion emails and NO, we will never ever ever sell or otherwise share your email address, account information or other personal data to anyone.

You can view the full privacy policy here: http://pbwiki.com/content/privacypolicy

And as for wiki security, these are the main differences between private and public wikis:

A private wiki:

1. Can only be seen by those who have been invited by the owner (administrator) with one of three things: a password, a "magic URL", or an invitation through the PBwiki identity system.
2. Anyone without access to a private wiki will only see the logon page and nothing else if they go to the wiki's URL.
3. We don't put any advertising on private wikis.
4. If you have a private wiki of which you are the only user, nobody will ever see your email address. If you have a private wiki that you share with other people, those people can see your email address.

A public wiki:
1. Can be seen by anyone surfing to its address.
2. All pages are visible, except in certain premium wikis with page-hiding capabilities. Even though everyone can see the wiki, only those who have been given access can edit the pages.
3. We place small ads on public wikis.
4. If you have a public wiki, only a logged-in member of your wiki can see your email address. Vistors from the world wide web cannot see it.

Your email address will not be exposed to spam bots or search engines, even on a public wiki.

For some more info, check out the Safety and Security section of the FAQ:

http://newfaq.pbwiki.com/The%20FAQ#Sa...