Don't know much about him, but he seems very anti establishment:
"Grillo has spearheaded several national and international political campaigns. On 8 September 2007, he organized a "V‑Day Celebration" in Italy; the "V" stood for vaffanculo ("f*** off"). During the rally, Grillo projected the names of two dozen Italian politicians who had been convicted of crimes ranging from corruption and tax evasion to abetting a murder. More than 2 million Italians participated in this rally.[4] Grillo also used this rally to urge Italians to sign a petition calling for the introduction of a Bill of Popular Initiative to remove members of the Italian Parliament who have criminal convictions of any kind from their office.[5] "