This Privacy Policy describes the policies and procedures on the collection, use and disclosure of Your information when You use this computer
When you access this computer via the web, the webserver logs the transaction (IP address, date, what web page/resource is accessed). You might (but probably won't, because it's too much of a pain) need to have an 'account' to access some pages on this computer, in which case the 'username' will be logged.
Some of the cgis use cookies, but only provide continuity from one request to the next; cookies are never used for tracking purposes, and are never linked to personal information.
DocDB is mostly for internal collaboration use, with documents and metadata referring to those documents, such as "revisions", "authors", etc. This is all stuff that is (or should be) widely available within the collaboration.
If you post documents that have the "public" keyword selected, then the files that you store are accessible by the entire web, so don't store anything that you don't want, or shouldn't, make public.
I'm goint to retain the Double Chooz DocDB files for as long as possible, and have automatic backups to help with that, but disks fail, so it's a good idea to keep backups of your own content.
Don't put any "Inappropriate content" here. It should be pretty obvious what that would be.