Buying and selling miles/awards is not a new discussion, but this one strikes me as something completely outrageous. I think AA went way over their heads here, they are infringing on fundamental private property rights. When one buys any Kellogg?s products (with or without AA miles) he/she retains the fundamental rights to sell or dispose of it in any way, providing it does not violate US laws. The same right would extend to empty boxes from any product or their fragments. It belongs to the person who legally acquired the product; AA or Kellogg?s has no claims over it.
When they are harassing people who intend to try to buy or sell these certificates, they are foolishly exposing themselves to the legal challenges. I have very little faith in class action lawsuits, but I do look forward to this one.

Oh, well, on a lighter note, it is easy to beat AA in this game even today. Don?t you, folks, has someone in your family without AA account? Just use third persons to buy/sell any airlines-related awards as long as awards are anonymous.