How to Spot a Psychopath

I just now belatedly noticed that Derek Lowe has written another of his occasional, but always entertaining, posts in his Things I Won't Work With category. (See also.)

This one's about triazadienyl fluoride.

You know how sometimes when you react one dangerous substance, like chlorine, with another dangerous substance, like sodium, you get something perfectly harmless, like table salt?

Well, that's not what happens when you react fluorine with hydrazoic acid.