Brits, Irish and Aussies too I believe. When I read that comment, I thought that Dread Pirate Roberts could be using Libertarian musings (which I've never heard outside of US political discussions) and references to US law enforcement agencies as a smokescreen for his identity.
Interestingly, and coincidentally, there's been speculation that the Bitcoin creator (Satoshi Nakamoto) could be an Irish computer science student called Michael Clear, due to British spelling in his (if it is his) written work: https://en.bitcoin.it/wiki/Satoshi_Nakamoto
‘British’ English is the standard English taught in Europe and the Middle East, likely in India as well, so I doubt that this is a remotely helpful clue.
Non-natives English speaker pick their English where they hear it. If you're watching British television or speaking with English people a lot, you'll surely pick some English colloquialisms.
Correct, I was mostly responding to ‘due to British spelling’ in connection with Nakamoto. The claim that some American spelling crops up in his writing (on the linked-to Wiki site) actually supports the idea that he is neither a native Briton nor American, but learnt British spelling in school and American spelling on the net.
Interestingly, and coincidentally, there's been speculation that the Bitcoin creator (Satoshi Nakamoto) could be an Irish computer science student called Michael Clear, due to British spelling in his (if it is his) written work: https://en.bitcoin.it/wiki/Satoshi_Nakamoto