Good call Horndog....Thats thing about heat treat. Bad apples are just that, doesn't mean that every one on the tree is no good. I make it a matter of distinction to test every blade I have. Since I never purchase a knife with 'resale' in mind, I don't have any without a few love scratches on them.
In fact, its the first thing I do. Part of the joy of opening up a new knife package. I open the front door, grab the package, fish my EDC (Izula) out of pocket and open it up as I'm walking through the house to my back deck where I have a handy stack of wood. I then baton that sucker and make curls and carve a few notches. Its how I rejoice my new knife. Christen it in wood shavings. Great way to say - that handle is comfortable or not etc.
I've never had one snap on me yet. If I did, I'd package it right up then and there and send it back to where it was purchased. Explain the situation and demand a replacement. Some knife companies provide warranties that give them wiggle room using the word abuse etc. SOG comes to mind for the reporting of poor customer service and reps labelling batoning as abusive even undermining their BF company rep's public statements about a given incident. I avoid buying from companies with piss poor customer service reputations like that.
In fact, RC-cutlery, Bussekin and Becker (via Kabar) are about the only production companies I'll entertain buying from. Beyond that its pretty much all custom makers for me.