(I've revised this to try to be more concilliatory and show my reasoning from Scripture more. Thanks for comments that pointed out that my post had not been very humble. I'm attempting to be provocative (I genuinely think this is an important topic where we may be putting unecessary burdens on children). I hope also to be gracious.)
Thabiti asks some good questions about church discipline. Is it a sin not to practice church discipline? And how does that square with the patience that we often advise in such matters?
It seems to me that we ought to practice church discipline for a few reasons: