I'd say that you chose a poor example as Logitech's customer service (in Europe at least) is second to none. They will send you replacements for free very easil

I'd say that you chose a poor example as Logitech's customer service (in Europe at least) is second to none. They will send you replacements for free very easily, while asking only minimal proofs (usually your serial number is enough). I know plenty of people who got their mouse or keyboard replaced in a few days after contacting customer service, without being asked to send the defective one.