I mentioned this on another post:
The late writer Pat Frank ( Alas, Babylon! & How to Survive the H-Bomb- and Why...) had a theory that if enough Americans prepared for nuclear war, the "winnability" of it would be questioned by the Kremlin, and they'd think twice about striking us. Maybe the same idea would hold true here? It can't hurt to arm yourself with knowledge.
NBC weapons are destuctive and awful in their own right- however, they are also terror weapons- and the counter to that is education, training, and preparation.