Why ACTA Is Unacceptable
ACTA was negotiated in secret
– For me, this is reason enough to oppose any legislation or regulation. I don't care if it's the "Hugs for Puppies and Kittens Act," if people aren't given an opportunity to engage with their lawmakers about a law, it shouldn't be enacted.
– ACTA specifies "presumptions for determining damages" that basically assume that all of the infringed goods had sold. To put it another way, ACTA takes the position that if a user uploads a song to a file-sharing network, damages should be calculated as if the recipients would have paid for the work in question. This is ridiculous, as has been explained any number of places. Many people who download illicit copies would simply never have purchased the work in question had it not been available for free.
It may be unconstitutional
– The Obama administration is claiming that ACTA not a treaty, but an "executive agreement" and thus not subject to legislative approval. As Rash notes in his eWeek piece, Congress does not agree.
– It's worth noting that not all of ACTA is necessarily bad. Some of the agreement is targeted at countering counterfeit goods that may be actively harmful, like counterfeit prescription drugs. But ACTA goes well beyond single areas of intellectual property and essentially tries to bear-hug everything IP-related. Not good.
The ACTA committee is not accountable
– ACTA creates a body outside of national and even international bodies, called the "ACTA Committee." (At least the name is honest.) The committee would not be accountable to the people governed by the agreement. Folks in the United States can vote out Lamar Smith and others who endorsed SOPA/PIPA, but we would have no real influence on the ACTA Committee.
Low threshhold for violations
– As the European Digital Rights group points out (PDF), ACTA's unclear wording would make it very easy for unintentional copyright infringement to rise to the level of a criminal act.
No fair use provisions
– As this opinion on ACTA by Eddan Katz and Gwen Hinze notes, ACTA would "export one half of the complex U.S. legal regime" but "without accompanying exceptions and limitations." In short, ACTA would not include fair use provisions and such that we expect in the U.S.
Criminalizes what used to be a civil offense
– An opinion prepared by Douwe Korff and Ian Brown notes, "ordinary companies and individuals could be criminalised for innocent activities or trivial breaches of copyright, or for technical breaches that serve a wider, overriding public interest (as in whistleblowing), without an appropriate defence." The EFF says "If the real intent behind introducing expanded criminal sanctions is to address infringement on the Internet, this provision is not likely to do so, but is likely to cause significant collateral harm to consumers."
Locks In DMCA-Like Provisions – As the EFF notes (PDF) in its submission to the USTR, ACTA would "lock in" some of the controversial aspects of the DMCA that require legal enforcement against circumventing copy protection, etc. In other words, don't get too set on the idea of jailbreaking that iPhone.
ACTA could be used against legitimate medications
– As I noted earlier, looking to crack down on counterfeit drugs is good. Going after legitimate "grey market" drugs, that's another story. Yet as Techdirt notes "there are very reasonable concerns that ACTA will be used to crack down, not on actual counterfeit medicines, but on "grey market" drugs – generic, but legal, copies of medicines. Some European nations, for example, already have a history of seizing shipments of perfectly legal generic drugs in passage to somewhere else."