I was baptized into a church at age 9, and my name might still be on the books. I thought about writing in to have it taken off, but it might stir up more contention than it is worth. I think they will eventually take me off if I never pay tithe. I don't believe the teachings of that religion anymore and don't act according to its laws or customs. Actively rejecting a religion might in some cases make for a more authentic "agnostic/atheist" because it requires a bit more commitment than to simply never have been involved.