I read this and had a few more thoughts than a comment would allow so I thought I’d just post them rather than clutter up the comment section. I guess I’m a closed-communion kind of a guy. I’ve never been in a church where communion was with held from someone who wanted it. I’ve never seen anyone who wasn’t a Christian ask for it in the service. If someone did who wasn’t a Christian how would you know?
I don’t think we should eject folks from the service if the Lord Supper is being observed though. I remember one of the first times I asked my Grandma about Jesus was when she made me pass the wafers without taking one. “You can’t have that right now,” she said, “or this either,” when I passed the juice. Members of the Church are different and have different perogatives than those of this world. It helps to point that out sometimes.
And I don’t have a problem with somber services. If I read the New Testament right the Corinthians were rebuked for their raucous celebrations and ‘love feasts’ with respect to communion. “Don’t you have houses to eat in?” Paul asks, or something like that.
I think you should be caught up in your prayer life before participating. A man should know where he is spiritually. I’ve discovered, though, that I believe a person who is saved is qualified—unconfessed sin or not. They have been made worthy by the blood of Christ. He has made them worthy—nothing they can do can change it. How does that reconcile? Well it may not, but the thoughtful person will realize that a believer will want to go into the ordinance with his mind clear and his prayer caught up.
As for the service itself, I’ve been served by the deacons in the pew and I’ve been invited down front to take communion when I feel I am ready. Both methods are worshipful and reflective, or can be. I’ve come to realize that some folks are just not going to ever think about anything.