The titlekey site isn't mine.You better believe that Nintendo can also reach you in Australia. The US doesn't treat with countries that do not honor the DMCA. They even got Sweden to cave to their demands, if they find out who you are and you are indeed running that title key site, you're toast my friend. Better get out while you can.
This is why you should warn users. You can't just bumble around with stuff like this. Your app will cause a huge ban wave.