There are many things that should be illegal that the law need not proscribe because humanity lacks the power to do the thing. As technology advances and humanity acquires the power to do more things, this set of things that need not be proscribed shrinks. The law must be at the frontier between what can be done and what cannot, substituting rule whenever another bad thing comes up into the light of science.
In general, there is this rule: As technology advances, the importance of law increases. As our power increases, our discipline must increase. Eventually, there will be no natural laws left to bind us, only human laws. Laws; but no laws of physics.