Overturn This

There was a guy on the street yesterday complaining about how our democracy had been compromised now that corporations are free to speak.  He had a petition he wanted people to sign to change this.

I didn't stick around, but I'm curious as to what people were signing.  Citizens United is a Supreme Court case, and now part of constitutional law.  What was he planning to do?  Did he support some law that did an end-run around the First Amendment?  Did he support impeaching a Justice, or increasing the size of the Court?  Or did he just not get it?