clone yourself from frozen cells... (Score 1)

Sure, there's ethical problems. Look up the horrible little flick called "Parts: the Clonus Horror" http://imdb.com/title/tt0078062/ summarized "Politicians scheme to clone themselves, assuring immortal life". They grow the bodies to optimum physical health then freeze them until the "original" needs a transplanted organ. Of course you've functionally killed a person with a complete personality to do it. Far worse than stem cell research in almost anybody's book.