Obviously it is the opinion of the author. Klonopin has a nasty WD that can be fatal, but then again, so does alcohol. Sounds like the author's kid got hooked on kpins, lol.
It's the opinion of the author. He can say whatever he wants, doesn't make it true. A question like, "what is the most dangerous pill/drug" is purely subjective.
And, there is no point in debating something so opinion based.