I'm glad this topic has come up. I totally agree with the original post.
Everytime I've gotten a used game from eBay, it's practically factory fresh. Meanwhile in the US, you're lucky if there isn't mustrad stains on the disc.
Seriously, how the fuck do people get even a tiny scratch on a CD/DVD? What happens on the disc's journey from case to machine?
Hence why at this point I simply don't lend stuff out to anyone.