I gifted some ISOM in a couple trades. I always wondered if they were "Factory" real and didn't have enough experience to tell. Everyone always says that sometimes the real ones are plugged, quality is bad, etc, so I always had my doubts. Sometimes they were good and sometimes they were not.
I had one trader tell me they were fake, and I felt bad, though I don't think he was mad. I decided not to even gift these rascals in the future, and will probably shy away from other ISOM outbounds until I know better.
So in summary, Tinman, I have been in your shoes, and I would never hold this against anyone.