"I bet you love this one....scientists disagreeing indeed debating its limits:). "
Actually surely the fact that there is a disagreement is significant and a good thing. Often in the past Scientists have been described as being something of a united front -- that's just not true, and a debate like this shows it. Even in the mainstream there are heated arguments... I've borne witness to some of them, and in the end it's not unlike watching an argument over anything else people care about passionately. Scientists too have human nature. Having the debate is important.
"...scientists do not have licence to carry out experiments whose outcome could wipe out mankind via an unstoppable pandemic. "
I think this is surely an exaggeration. It reminds me just a little of the, utterly unfounded, fears surrounding the start-up of the LHC. Oh, it will create a Black Hole and end the world, said some people. Or, if not a Black Hole, then some equally terrifying Doomsday scenario. Never mind the fact that on the Start-up day itself precisely nothing happened over than accelerating a few protons that didn't even hit each other up to energies rather lower than had been achieved at the Tevatron for years. Still, presumably we had "no right" even then to, according to the same people, to play with the very fabric of the Universe while we didn't understand fully things at a lower energy scale. I didn't buy the argument then; I don't now.
Nor are such experiments anything to do with thinking of ourselves as "Masters of the Universe" as Khandro puts it. It's just curiosity taking its natural course. "What if there were no need to stick to the ACGT alphabet of life?" they ask. Perhaps far sooner than anyone could possibly have imagined, we might know the answer. This is curiosity and imagination at its most profound. And potentially scary, perhaps, although on the face of it something that is merely self-replicating but carries no protein-coding information has no potential to be anything other than a lab curiosity for a very long time.