Jeff,
Is there some way to test for these thrown knives? Under a microscope, does a break from throwing vs. a break from prying look different? I've read before on this forum that throwing leads to micro-fractures in the steel. Is that true?
This looks like a job for ... SCIENCE!
But really, how can you protect yourself from this? Maybe the next time someone sends you a knife they used to throw at a tree you can weld it back together backwards and really send them a message? Okay, maybe that wouldn't work, but I'm still concerned.
Are these sorts of claims putting your business at risk? How are other companies who have this sort of warranty doing it?
Or are these incidents isolated enough that the damage is minimal?
It's hard not to worry about ESEE, or companies like it. It's much too easy to imagine a world where they are just a nostalgic reminiscence for those of us who enjoy a quality, United States made blade.