If you are referring to their folders, they are designed to be used tactically and carried with defense in mind.
As such they may not have that perameter [throwing opened ]built into them.
If you want to throw a knife, get some throwing knives. They won't do you any good in a fight but you can throw them, thats what they were designed for.
The MOD was designed to be handheld in use of ones personal defense. Right tool for the right job here is in order.
I wasn't aware of MODS warrantee exclusion but it makes sense as they don't design it to be used that way. Had never thought about throwing one of my MODS [several models] but then you did and hence some atty: did their job in writing it.
Throwing a MOD opened would be misuse and abuse of that tool in my opinion. I would not expect it to last long, nor any tactical folder for that matter, being thrown open at hard targets.
Brownie