Agreed, Zimmerman deserves a fair trial (followed by a fair hanging)
Since the state is not charging him with a crime, though, it is completely reasonable (IMHO) for the public to gather and analyze evidence sufficient to compel it to do so. In the mean time, yeah, the guy's life has been torn to pieces. it would suck to be him.
But if I were him I would most definitely *not* prefer my day in court. Not only are there very few circumstances in which I would voluntarily put my life in the hands of a Florida jury, but Zimmerman will still largely be "guilty" in the minds of the public regardless the outcome. Perhaps even more so after an acquittal.
If he is smart he has already fled the country and made a book deal to pay for it. If he doesn't have the brains or the emotional fortitude to leave America he should just end it all, (hopefully by taking a casual stroll down the streets of Camden or Compton wearing a sign, like Bruce Willis' character did in Die Hard with a Vengeance. That would be cool.)
A trial doesn't sound like a smart option for the guy though.