Regarding your post of 11:19.
I might be grabbing the wrong end of the stick, but if I'm on holiday and someone in a bar asks me where I'm from, it's not rude.
However, if I'm in a bar in London and someone from the UK asks me where I'm from and I answer "London", and then they follow up with "No, I mean originall." then I tend to roll my eyes and find someone else to talk to.
But then - that hasn't happened for absolute years.
Oh, and whenever I'm in California, the locals hear my accent and assume I'm from Australia.
Apparently to some Americans, the London accent and the Australian accent are 'interchangeable'.