What could possibly go wrong with installing DOD's Root CA? Uhmmmmmmm
Very little, since it's primarily for internal DoD use. It was never meant to be a part of the commercial 'web of trust' nonsense, and exists so that DoD doesn't have to trust idiots like Comodo.
Exactly. It's also a logical extension of their COMSEC doctrine which led to things like NSA's EKMS: