I am not that sure about a bad dealings sticky.  I think it would just lead to bad feelings and maybe some premature and unfair judgements.  I still have a trade outstanding that I sent out several months ago.  It still think the guy is a straight up guy and will come through at some point.  I don't think that calling him out would be helpful for anyone, or for the tone of this forum, which is generally positive.  
Same goes for the bow trade.  Keep a list of deadbeats that can be passed on, but let's focus on the 80% that went well.
And Patrick totally deserves to get a really nice bow.  Some of you offered to square me away if it didn't work out for me--I think it would be very nice if someone could set him up instead.  That was maybe the nicest bow of the trade he gave away (except  for the one I got, of course).