Some details by Mark Krikorian sums it up best:
Yesterday’s heckler at Obama’s pro-amnesty speech in San Francisco was Ju Hong, an illegal alien from South Korea who recently graduated from UC Berkeley. People who still say illegal aliens “live in the shadows” obviously don’t know this guy: He’s on Twitter and LinkedIn, was a member of student government, has lobbied for taxpayer subsidies for illegal-alien students, and has been the subject of so much fawning news coverage he has his own topic page at the Cal student paper.