What do you think would happen if you bought a one way ticket to Iran, and just showed up? Do you think they would put you in jail? Do you think they would deport you? Do you think they might lock you in a little room and in-terror-gate you? Well, you are wrong. Here is what happened in 2012 when the Yomadic did just that:
"... the friendly Iranian officials at Imam Khomeini International Airport in Tehran asked me a few questions, typical of any airport anywhere, they efficiently processed my application, stamped my passport with an Iranian visa-on-arrival, welcomed me to their country, smiled, and let me in. I walked out of the airport, leaving behind one of my many preconceptions about Iran."