Starbucks and protest

Starbucks gets a pretty hard time from protestors all over hte world - but maybe this is just a result of a poor strategy. What if they offered "Fair trade" and "free trade" coffee, all they need to do then is record how many purchaces of each type there are - report it in their public accounts - and use that to determine their purchasing habits. Just like in macdonalds - "would you like fair trade with that coffee?" ok maybe not quite like that but then if everyone uses fair trade then good if no one does it it demonstrates that the public is the main "problem".