You might see that the Dropbox Community team have been busy working on some major updates to the Community itself! So, here is some info on what’s changed, what’s staying the same and what you can expect from the Dropbox Community overall.
Status:
Closed
Allow Users to Leave a Shared Dropbox Paper Document
Currently when a Dropbox Paper document is shared with you it's impossibe to remove yourself from it. Not only this, but all others that the document has been shared with can see your email address. ...
This relates to a long running thread on the community here.