He thinks cloning is bad because someone might mike a clone army and then only one person with a billion clones would survive. He works night and day to stop cloning because criminals will be able to make clones to.

http://gslc.genetics.utah.edu/units/cloning/

http://www.ornl.gov/sci/techresources/Human_Genome/elsi/cloning.shtml

http://www.humancloning.org/