Are you kidding? .
I wish it was a joke. Too bad it's not.
Here's a very good example: Taylor offers a limited lifetime warranty for all their knives, and I own several S&Ws and Schrades. There's even a clause in the statement that international customers should return the product to the place of purchase if a claim is needed.
Based on that clause, my country's resellers should honor this lifetime warranty. But no, all we get here is a warranty period ranging from anywhere between three months to two years, depending on the reseller. And once that period is up, we are going to have to ship the defective item all the way back to the US at our own expense.
For premium brands like Benchmade and ZT, the value of the knife far outweighs the shipping cost and is at most a major inconvenience. But for something like a Buck 284 and most of the low-cost S&Ws and Schrades, it's cheaper to just trash it and get another one.