I think it will definately make a difference and it will get a ton of media coverage. It will paint a very clear picture on a national scale that people will remember.
Will it help Pioli get fired?
I don't know. I hope so. What I do know is that it sends a strong message that the fans aren't going to take the bullshit anymore. This will send a real warning.
This is kind of off topic but, a few years ago at UGA, the fans were told to wear black to the Auburn game. The captains came out for the coin toss wearing the traditional red uniforms. Moments later, the team ran out in black uniforms for the first time and the stadium went nuts. The place was electric and we crushed Auburn. It's not the same but it was cool and had a positive effect. There was some red sprinkled in there but it was mostly balck. Here's what it looked like...