[TheAmazingIdiot]

If I wanted to be a complete ass about using dropbox for piracy, I'd use GPG.

Share the GPG private key, the public key, the archive, and the password to use the key. It's too computationally expensive to automate opening these. And you could always spread the keys and keyphrase to where ever you want it.

But dropbox works well for what it is. I see no reason to trash it with pirated stuff.

[sycren]

If dropbox opened the archives (to check) then it would be against the British data protection laws (and probably most other countries) if they were not given the access by the owners.

I have no want or need to trash it with pirated material either.

[metageek]

Even in the US, it might be illegal under the ECPA.