"To err is human; to forgive is divine." - -- Alexander Pope
I have hosted several swaps and I have to say that it is much harder to coordinate than most people think. It is actually a lot of work. I have been burnt many times by people that forgot to send postage or return packaging. I never called anyone out and just assumed it was error on there part. I sucked up the cost to avoid an issue like this. Honestly, I think everyone that I have hosted has has cost me money and stress. A couple of times I can remember being very overwhelmed by the whole thing. Most often it was because people did not follow the rules of the swap - missing deadlines, not sending postage, sending a match box to return a streamer swap, being very late on sending the flies, dropping out of the swap, Blah blah blah
Give the guy a some slack there are better things to get mad about.
Brisket !