If all 2K people want is for Christians to speak as individuals rather than through the institutional church except in cases extraordinary, I have no serious objection.
The only qualification to make is that when Christians speak as individuals they do so not as the Bishop of Rome. That means that when Christian persons speak, they do not define the Christian religion or the normative, Christian view of gay marriage legislation, baking recipes, who plumbers fix leaks, or which method an accountant should use (accrual vs. cash). Just because a Christian is speaking doesn’t mean any other Christian needs to recognize or heed the person who invokes Christianity for his or her views. And just because a beliver thinks Christianity requires a certain curricular choice, a specific set of historical circumstances, a particular policy initiative, doesn’t make it so.
In other words, if the institutional church is near to your understanding of Christianity, as in you need to belong to the body of Christ, then what churches say about Christianity carries weight. What church members say is like just an opinion, man. (Remember, in the Orthodox Presbyterian Church, study committee reports are merely pious advise.)
And when you look at what institutional churches say about public policy, you find surprising little or nothing, unless, of course, you belong to the Roman Catholic Church where for over a century popes have pontificated about almost every square inch.
Yet another reason why anti-2k is the gateway drug to Christendom and the bishops who created it.