Skiptomylu - Very interesting! I've been using these snap hooks for more years than I can remember and have landed countless crappie, trout, bass and pike. Never had that happen to me! I started using these when I use to fly fish for quick change of flies (which is what Mustad intended them for).
Never a failure during those early years either. I suppose it could happen though. I'll still keep using them regardless - as I've said many times, I'm strictly a CPR fisherman and loosing a fish or two is the least most important thing to me these days. I'd probably sing a different tune if I were in a tournament, but since that will never be in the cards for me, I'm pretty safe with what I have been using.
"A voyage in search of knowledge need never abandon the spirit of adventure."