Jim West is absolutely right, such people have no right to be interpreting the Bible. However, that said, I am not sure that I trust most biblical scholars with the task of interpreting the Bible either. As Stanley Hauerwas observes, biblical scholarship and fundamentalism are two sides of the same coin, both assume that the biblical text should be accessible to anyone without the necessary mediation of the Church.
The most essential training in biblical interpretation that we will receive is not that provided by a theological degree, important though that is, but the training provided by belonging to a faithful Christian community under wise and faithful pastors. For this reason I am as suspicious of the assured interpretations of much modern biblical scholarship as I am of the interpretations of Jehovah’s Witnesses and others like them. For all of their valuable linguistic gifts and scholarly credentials, biblical scholars outside of the Church are dilettantes who lack the basic training to interpret the Church’s Scriptures aright (this theory that I had to study last semester is a good example). Those who have not undergone and are not undergoing the paideia of the Christian Church, living as a community of discipleship under the Word of God, have no right to interpret the Scriptures. For this reason we should not even enter into debate with them on questions of interpretation.