For some reason this topic has built up an epic level of FUD.
Their system was designed to be used in response to DMCA notices. Dropbox would get a takedown notice, they'd flag the file to be removed, and an e-mail would be sent to the uploader of the file informing them of the DMCA notice.
In this case, a dropbox guy used the tool without realising that the last step was automated. There was never any DMCA notice generated, just a DMCA notice notice.
If all else fails, lower your standards.