From the Google recommended a Washington Post Article from Rob Pegoraro. It remarks:
The fair way to craft a deal like this in the daylight. When the United Nations’ World Intellectual Property Organization proposes to write new treaties, it does so in public, publishing drafts and allowing outside parties to report on the progress of talks.
Of course that also applies to common trade negotiation. The strange aspect of ACTA is that we don’t have public access to the shared documents. But is access to the drafts really necessary?