Cloning is not wrong. Neither is stem cell research.

How we use those techniques and for what purposes might very well be wrong, but all the more reason to allow open research. If you ban it, you risk it being abused (like the rogue Italian Professor, I forget the details, or the fraudulent results that were reported).

Splitting the atom eventually led to the A-bomb, as well as atomic energy. The research leading to both these developments was not wrong, but the way the research knowledge was used led to two very different outcomes.

Anyway, who are we kidding? There's no stopping scientific progress. Banning cloning or stem cell research today is like King Cannute trying to stop the incoming tide.