Adam Levitin responds to General Mills

Here:

By permitting, allowing, or suffering me to purchase any of your products or services, whether directly from you or indirectly through dealers, vendors, agents, or other third-parties, you agree to irrevocably surrender all rights to compel me to arbitration or to waive my rights to proceed against you as a member of a class action.  In order to make this provision effective and allow effective vindication of my rights, you also agree to irrevocably surrender all rights to compel arbitration and to prevent class actions against all other purchasers of your products and services.  You also agree to cover all of my costs associated with bringing an action, including attorneys' fees and any damages awarded against me, irrespective of the outcome of the action. 

As he says, let the battle of the forms begin.