History shows that "it" always starts out being a good and helpful thing. Those who disagree may fall into two camps 1) those choose not to think, to consider the implications, and apply the "perfect" conditions that will not always exist and 2) the others who would misuse authority to dominate and rule. The following is as true today as it was over a century ago:
Necessity is the plea for every infringement of human freedom.
It is the argument of tyrants; it is the creed of slaves.
-William Pitt, British prime-minister (1759-1806)