I once refused to give my MBP password to the technician at the Apple store for some hardware repair, and he said that they just wouldn't be able to verify the

I once refused to give my MBP password to the technician at the Apple store for some hardware repair, and he said that they just wouldn't be able to verify the repair completely. I'm not sure how true that was, but it did catch me off guard that they would even ask for a password.