I must be missing the point. How is this different from right now, or any other point in history? Some have more wealth than others. Some starve because of it. What is the new issue?
Tvashtarkatena makes an excellent point: in our economy the best thing you can do is vote with your dollar. I think a lot of people talk big about this kind of thing, theoretically, and then go and buy Brand X just like before. I think some people don't even understand what they're doing.
To this end, empowering the consumer to make choices that are in line with their beliefs, I'd support the use of some kind of "clone free" sticker. EXCEPT, I think the primary purpose would be to feed on the fear uncertainty and doubt- people are ignorant and anything new seems scary. A clone is a genetic copy of an organism. It doesn't seem like there should be any reason cloned products are dangerous. I'm all for gathering evidence one way or the other, but it seems obvious to me which way I should believe in lieu of any evidence.