Checking in for flights is dumb. Just issue a boarding pass automatically. I paid for the ticket so assume I'll be there. You'll know if I've changed my mind because, in that case, I won't board the plane.

I think that airlines bother everyone with stupid check-ins to estimate how many seats they can offer last minute or to reduce the food/staff allocated. Those are fine goals but consider, instead, offering an incentive for no-shows to relinquish their ticket and leave the rest of us out of it.