Who fears a world made of clones?

Sometimes the thought that that ugly guy you hate will one day die makes you feeling better.
But what kind of nightmare the idea that he could be cloned and be born again?
"Meet Lancey, the first commercially cloned dog, delivered to Edgar and Nina Otto on Monday. The Ottos bid and won an auction to receive a genetic duplicate of their beloved Labrador named Sir Lancelot, who died in January of 2008. They stored the donor dog's DNA, and from that, his identical twin, created by BioArts International (no, it's not called RePet, The 6th Day fans), was born November 18th."
The question is: do we go too far or should we let progress be progress and accept whatever it brings?