Last month, two members of the U.S. Senate vilified Eduardo Saverin, the cofounder of Facebook Inc., for doing something that Americans are apparently coming to consider a punishable sin.

Sen. Charles Schumer, along with three cosponsors, has introduced a bill in the Senate to go after people like Saverin. On May 24, Sen. Schumer held a press conference in Washington, warning Saverin that the day of reckoning for him and others like him is swiftly approaching.

Saverin, born 30 years ago in Sao Paulo, Brazil, spent much of his childhood in Miami, Florida and was the holder of a U.S. passport. However, in September 2011 he renounced his U.S. citizenship. He has been a resident of Singapore since 2009.