"Dropbox and Third Parties allowed to access, scan, store and duplicate content" 12 years ago
From the actual document:
These and other features may require our systems to access, store and scan Your Stuff. You give us permission to do those things, and this permission extends to trusted third parties we work with.
This is nothing new...
Dropbox security is horrible (at least after they made everything public without asking) and I'm worried about the "trusted third parties" which could include the NSA, etc.