Who gives a crap? Honestly: If you do not like the idea of being an unpaid intern, then don't be one. What's not a worthwhile opportunity for you might be an opportunity to someone else. Am I missing something? Seems like unpaid internships affect me and my job/economy as much as someone else eating a donut affects my weight.
Unpaid internships undermine the entire legal and moral principle that workers are supposed to be paid. There's a reason we have minimum-wage laws, and of course, anti-slavery laws.