"it's clearly none of Dropbox's business" Actually, it's a core piece of Dropbox's business. One of the ways they save on storage is by comparing hashes of fil

"it's clearly none of Dropbox's business" Actually, it's a core piece of Dropbox's business. One of the ways they save on storage is by comparing hashes of files (or even parts of files - how many bits of any two JPG or DOC files are identical?) being stored and, if identical, only store one copy of the file. That and they explain in plain english that they're allowed to do that. That they explicitly say they do as much in their TOS puts the onus on the user to not store anything they're concerned about the privacy of on Dropbox's servers.