I wold think the only way to protect him would be to put him in solitary, 100% segregated from the inmate population.
FWIW
A poster on http://www.facebook.com/pages/Save-George-Zimmerman-from-racial-onslaught/111653988888547
reports 4 hours ago from near Brooklyn...
“i dont get it.. martin supporters got what they wanted. why are they going around harassing ppl i kno in my neighbourhood. scream spics are racist! that we think were white!! breaking ppls windows!”
I questioned whether there were cops or media at the scene and she said no (2 hours ago)