I live in India and most of the points mentioned are common sense stuff here - in other words just don't assume anything apart from Country and State. Just give two/three fields and let the user write his address... :-)
Nope. You cannot block anything. This extension has been specifically developed to block MG's posts on TechCrunch. So its for TechCrunch lovers who don't like MG's posts... Based on feedback/suggestions, I might add more features/blogs in the future. Lemme know what else you would like to see... :)