Personally, I think people should be called out on it publicly if they can't provide proof that they actually sent the package. I think we should all know who is capable of screwing a friend.

I know there are always circumstances that come up, but an explaination to your person and to the coordinators of the swap should be made and some sort of arrangement made.

I think it's a huge responsibility and I just don't think everyone is capable of handling it.