The demagogue Hyperbolus was the last victim of this institution (probably attributable to Cleisthenes) which allowed the Athenian assembly to send some of their citizens into a forced exile.
Bouchard, Elsa. "Final use of the ostracism law in Athens". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11233, accessed 21 May 2013.]