That doesn't surprise me. Regional restrictions on apps might not make much sense, but they're well known and exist on every platform. Same with age restrictions. You can't enter into a contract with Microsoft or a third party developer unless you're over 18. It's not just Microsoft that forces this.
For example, here in Uruguay, there's a distinction between minors up to 16 years, then they can enter some contracts (for example work contracts, I don't know where downloading apps falls), and they become full adults at 18.
In the U.S. there are some restrictions up to 21 years old, but they can drive at 16 (!). My cousin was 17 at the time I was setting up her phone, I'm not sure, but I guess she might have been legally able to enter a contract with Microsft at the time.
Google is more lax with its settings, or has better lawyers. Also, if you move to another country, you CAN change your settings (it's extremely ridiculous that Microsoft doesn't let you do that).
I can totally understand that Microsoft doesn't want to go over the minutiae of every small nation to see whether someone is eligible or not to enter a contract.
I wonder what Firefox OS will do with all these legal restrictions (offload to the app developers?)
