Right to freedom speech and expression is as precious and as vital as Right to Life itself, for without freedom of expression life would be a barren patch of land in the middle of an endless desert, unproductive and joyless. Unless the freedom of expression is given a wide playfield, no democracy could possible boast of being a 'true' democracy.
However, every now and then, someone stretches the freedom a little too far and has to be pulled back into the limits. But the tool of making people fall in line might be effictive, but is also dangerous. Therefore, before we allow the State to silence voices and ban books, we must closely scrutinize each instance of the exercise of such an oppresive power.
It must not be lost sight of that one might hold a wholly enreasonable opinion based on questionable facts, but shutting the person up is not an 'improper' response but an 'invalid; one. Banning books is one such cowardly denial of intellectual engagement.