http://www.dropbox.com/dmca#terms
Access, tamper with, or use non-public areas of the Site (including but not limited to user folders not designated as 'public' or that you have not been given permission to access), Dropbox's computer systems, or the technical delivery systems of Dropbox's providers;
Attempt to access or search the Site, Content, Files or Services with any engine, software, tool, agent, device or mechanism other than the software and/or search agents provided by Dropbox or other generally available third-party web browsers (such as Microsoft Internet Explorer or Mozilla Firefox), including but not limited to browser automation tools;
1. Dropship violated Dropbox ToS, by reverse-engineering Dropbox proprietary code.
Thats all.
Nothing to do with DMCA notice, which was sent by accident.
"This is Arash from Dropbox. We removed the project source code from the user’s Dropbox because it enables communications with our servers in a manner that is a violation of our Terms of Service. By our TOS, we reserve the right to terminate the account of users in this case. However, we chose to remove access to the file instead of terminating the account of the user."
I'm questioning whether possessing the file without using it against Dropbox is actually a TOS violation.
I am actually curious to know what ToS were violated (based on which Dropbox decided to take the action), except that I have not read about the real reason on either the Original Article or the discussion on HN.
Can Drew/Arash clarify what Terms were being violated actually by dropship?