IMO its a simple equation. Strider makes some of my favorite designs. They aren't the finest knives in the world but I really enjoy the product. I enjoy the design, materials, weight, action, steel & their philosophy. The warranty is reasonable to say the least.
Benchmade and Spyderco both state that disassembling their knives will void the warranty. Like Strider, it's just a CYA thing. I would imagine that any adjusting that is needed & does not damage a screw or part of the knife is fine. I can't see where someone would think that if they put a tool to something and damage it that it should be covered by ANY warranty.
On the other hand, their coverage is about as good as it gets. Break the knife prying a door open? It's covered. Most if not all other companies would call that outside the realm of intended use & charge some substantial buckage for a new blade. Busse & Fam. & ESEE are the best, warranty wise, but they don't make folders (Yet!).