Sure, much like you can get your 15 minutes of fame and get on national TV. I wouldn't call "the whole country" one community with smaller child communities tho

Sure, much like you can get your 15 minutes of fame and get on national TV. I wouldn't call "the whole country" one community with smaller child communities though. To me, community implies some amount of connections between the members. I've never put a number on it, but basically something like "if you randomly pick X people from the group, at least Y of them will know each other". That would limit both the size and also do a reasonable test for community membership: if nobody in the community knows you, you're not a part of the community.