For the record, I don't think of GUEST 9:04, 9:26, 10:19,10:24 as being a troll. A little heavy-handed, maybe but then, s/he is not on a negotiating team.

I think s/he makes good points- I, for one, do approach with wariness any post that is blank or just GUEST. And Guest 9:04, etc, is right that when a guest signs in with a tag appended I in many cases tend to think the person plans to be somewhat accountable.

As to whether Americans are more or less insular than other countries, I suspect we all tend to judge others by our own communities. Not only that, many, many times when a person draws a blank on the location of a specific city, country, continent- I think it's because the speaker was not understood. We do pronounce things very differently from each other, and given a 'strange' accent to boot, the listener often simply does not understand the question.

I remember years ago in Virginia a woman asked my father where he was from. He said, 'Oregon', pronouncing it the way Oregonians do, which is NOT the way it appears. She asked him twice then finally shook her head. "Never heard of it," she said.