Even if George Soros funded Adbusters directly and either were 100% purposeful in this kind of action he nor Adbuster have control over the protests. A number of protesters may not even realize what Adbusters is or how it was used in starting the organizing of OWS. The mechanism of the GA alone prevents the kind of control an astroturf campaign might need from used organizations. This would include issues of partisanship.

I'm saying even if an individual or group wanted to, due to the fundamental nature of the organization, they can't control the protesters or easily shape their opinion from within the organization. The general influence from AdBusters is included in this limitation. People are not supporting this because they like AdBusters but because the core message of the protest as described by those protesting strikes a cord with them. Many are calling for nonpartisan goals with an inclusive message. That is not to say either party would not try to use the movement for their own gain. This would include fear mongering from the right as well as absorption by the left.

Article in question and response article to give more detail.

Many of us didn't need Adbusters to say any of this.  Those of us who stayed awake in class have seen what has been going on in this country and we have been blogging against it for years.  MANY of us wanted a nationwide movement LONG before this.  It's a sad statement of our nation's apathy that it took THIS long for people to stand up and start speaking out.