Spike Lee apologized to a Florida couple on Wednesday for re-tweeting their address as the home of George Zimmerman, the shooter in Florida's Trayvon Martin case. Within minutes of Lee's apology, comedian Roseanne Barr posted the correct address of George Zimmerman's family. She quickly apologized and deleted the Tweet. Also this week, Justin Bieber's Twitter prank went bad, a student in the UK got jail time for racist Tweets, and a New Zealand cricketer won the first-ever Twitter libel judgement. Brent spoke to David Fraser about Twitter and the law. David is on the editorial board of the Canadian Journal of Law and Technology, and he teaches Internet and Media Law at Dalhousie Law School.