A Wannagooder is a synonym of naive. A wannagooder is someone who wants to solve the worlds problems by engaging in naive acts.
A wannagooder never takes the time to understand the true nature of the worlds challenges and how they might actually be solved.
The word comes from the combination of "Wannabe" and "Do-gooder"
Those people are such Wannagooders. They recycle religiously and think they are saving the world, but they really just keep the price of aluminum down for the megacorps.