In reply to Roy Southern.

I'm not sure using Judas as the indicator of whether or not we should commune someone is a good tactic. On the one hand, there's no guarantee that Judas as at the table. According to the Gospel of John, Judas leaves the table at some point. On the other hand, if he was at the table, he bore the judgement for his sin. It's yet a further reason to practice Closed Communion.

Now, you are correct that the Lord's Supper does not take place between you and the pastor. But the pastor is not work on his own behalf; he is there as Christ's representative (cf. John 20:19–23). He cannot speak more or less than God's Word because he does not have anything to offer but what Christ offers; he has nothing to speak except what Christ speaks. But when he does speak, he speaks from the authority of Christ (Luke 10:16).

Furthermore, also note my comment below. Faith is personal, but it's never private. We publicly confess what we believe in a number of ways, not the least by virtue of the church to which we belong. That must have a bearing as pastors provide loving care for those entrusted to their care.