Start a micronation. You can print your own stamps and even money. There are about 98 active micronations across the planet from Australia to Antartica. They are not officially recongnized by the government but that doesn't stop them from trying.

They even had a conference this year...Micro Con 2015. Here are some of the micronations that attended:

• Kingdom of Ruritania, .34 acres in Georgia (U.S)
• Kingdom of Slabovia, they lay claim to 300 acres on Mars
• Provisional Territories of the F.A.R.T., which stands for Free Autocratic Republic of Totalitarianism
• Kingdom of Vikesland, strictly online
• West Who, also online and thier capital city is Whoville
• Republic of Molossia, an acre in the Nevada desert that has its own bank, post office and naval academy
• Grand Duchy of Westarctica, located on 620,000 chilly Antartic acres

Maybe we can start the Kingdom of Gotham...