Uber CEO Travis Kalanick arrived in New Delhi a few days ago without a visa but some middle-of-the-night scramble and help from influential Indian contacts prevented what could have been an embarrassment for him. So there was no deportation!
This will have been unthinkable for anyone to land in the U.S. without a visa and make it out of the airport.
Visa on arrival is not available for visits to India. The process was simplified in early 2014 making visits possible with an e-visa for tourists.
G Joslin Vethakumar