If it were me, I would have started boycotting it after Casey Anthony. That said, people don't realize that this was an issue with the prosecution's take on the case. Boycotting the state isn't going to change anything, but it's nice PR.
Don't see how boycotting is ineffective. It's proven to be one of the most effective methods of protest in a free market society. When concerts start drying up, fans take note of why and would presumably carry that to the ballot box.