No, this is not a joke. Yes, we're sure. A micronation is a state, country, person, or whatever that has seceded from regular society. They are unrecognized nations, existing within other nations. There are a lot more than you would think.
Many nations are on the net now.
Aerica predates the internet, but many nations started when the net came out. We decided it was a good way to meet them. We started before we had ever heard the term micronation. The Emperor decided, on his birthday, to do something no one else he knew had ever done. Therefore, he made a city called Aerica.