San Francisco already has Night-Of-The-Living-Dead homeless degenerates here (in SF). They would make the Palestinians look like royalty.
I remember standing on Market Street in the Financial District, in suit and tie, when some homeless dude pulled a Wendy's cup out of the trash can and urinated in it right there on the sidewalk. But if it had been Ann Coulter speaking her mind, she would have been shouted down the Peninsula. That's a liberal's idea of freedom for you.