In the style of Stephen Lett, I'm trying to come up with an exhaustive, enumerated list (without his crazy eyebrows, goofy facial expressions, and nutty voice). What Watchtower has gotten wrong isn't just their 2 witness rule. It goes much deeper into other failures of JW dogma that has allowed this injustice and others to flourish in their organization. I'll start with a rough outline. Please fill in any details that you think are valid.
What They've Gotten Wrong:
1) Confidentiality. The secrecy of the JW judicial committee procedure has no scriptural or ethical foundation. In the WT 6/1/2010 p. 15 they acknowledge that all judicial cases in Ancient Israel were held publicly in the city gate, not in some windowless room away from public scrutiny. In the WT 4/1/2011 p. 20 is a list of the illegalities of Jesus' trial. One illegality on that list is standard procedure for JW JC's: "The case was heard at night behind closed doors." Five other things on the list are also common illegalities that occur in judicial committee secret meetings. There is nothing in the Greek Scriptures that would reverse the policy of public hearings. JWs will often speak about Paul's 'disfellowshipping' a wrongdoer in 1 Cor. However, the case was not at all 'confidential' since the immorality was public knowledge and described by Paul. Even the supposed 'governing body' meeting in Jerusalem as described in Acts was recorded and written for public consideration. So it's clear that the current policy of 'confidentiality' and secrecy by Watchtower leadership has no scriptural foundation. Additionally, we know that for courts of law today, justice requires that the trial be open to outside scrutiny. If the JC hearings are truly just, shouldn't they welcome public scrutiny?
2) Elders as Busybodies. Often the reason that judicial committees desire confidentiality is because many of the cases they hear are simply none of their business. WT claims that they don't want to embarress the wrongdoers, when in reality it is the elders that ought to be embarrassed of their meddling in matters that are not their business. One outstanding example is the WT 1/15/2011 pp. 28-9 with an account of a young man that has been viewing pornography and is expected, indeed demanded, to confess to the elders. In many other instances, WT has expected someone who masturbates to confess to the elders. Obviously, there is little scriptural support that can be twisted to support such a policy. If it's something that really bothers a kid, he might speak to his parents. But there is really no reason for elders to become involved in these and many other private matters.
3) False Equivalence. Since elders easily become involved in both trivial matters such as masturbation and condemn it as idolatry, greedy, selfish, unclean, and evil, they will look at the next case of child molestation as idolatry, greedy, selfish, unclean, and evil. Yet, these two things are hardly equivalent. Someone masturbating is really nobody else's business. Someone molesting a child is terrible, disgusting, and criminal! An engaged couple getting lucky together doesn't really hurt anyone, yet they will get dragged before a judicial committee the same as a child molestor might. That couple will not be allowed to get married in the Kingdom Hall, with everyone figuring out their 'terrible sin.' Yet, the child molestor may be able to continue at the Kingdom Hall as if nothing happened when there wasn't a 'second witness' to his crime. Child molestation is a crime. Masturbation is not. They should not be treated the same.
4) Lying/Untruthing. The WT 2/1/2007 describes a deep-seated injustice in Watchtower mentality. p. 6 "Every lie is an untruth, but not every untruth is a lie." Watchtower explains that something is only a lie if there is the intention to deceive someone. In other words, "It's not a lie if you believe it." Consequently, JWs are conditioned to never look too deeply into a matter to find something that will contradict their preconceived ideas. They can't dig deeply to expose lies when they consider something untrue as unworthy of serious scrutiny. If they're happy with their untruth, they see no reason dig deeper and expose it as a lie. That's simply too much trouble. So they settle for accepting a lie simply because they don't think they're being deceived.
5) Lack of Education. Anyone that watches modern crime dramas or follows the news, will realize the importance of forensic evidence in solving criminal cases. Yet, Watchtower ignores the value of hard physical evidence in favor of verbal testimony. In our modern era, there is no reason that WT elders would not boldly call the police FIRST when the hear of a child molestation incident. Law enforcement, medical technicians, and psychologists can skillfully determine the events of a case far better than a judicial committee. WT needs to recognize their inability to match these modern tools of justice.
6) Demonizing "the World".
7) Worshipping and Protecting an "Organization" instead of Worshipping God and Protecting Children.
... sorry, short on time. Gotta run to class...