I've been wondering whether enough people have had items confiscated that the following idea would be useful:
Have some kind of padded envelopes available to mail confiscated items back to yourself. I don't think there is enough money in this idea to be able to pay someone to sit there and collect them, so it would have to be some kind of self-service kiosk right at the checkpoint.
Perhaps there could be a set fee schedule based on weight, and the items would be returned COD. Or, there could be an order form to pay the service charge with a check or credit card.
Given airport prices, I suspect this service would need to be too expensive for nail clippers. But would something like this be used enough to make it profitable?