From July 18th, Jon Lighter in ADS-L:
 A television journalist with an English accent reports from Jordan that after the Tennessee gunman “came back [to the U.S.], he drunk drove.” This reveals the deadly seductiveness of the New Syntax: “drive drunk” takes no longer to say and is arguably more euphonious.
Lighter has a long history of scornfully criticizing innovative back-formed verbs like this one (to drunk drive / drunk-drive). His plaint is that in general there’s no justification for innovating new verbs when we already have a way to express the meaning, though the innovation might be defended if it provided a briefer alternative to the existing expression, which is not the case here; moreover, he assumes that the reason people innovate such verbs is merely to sound fashionable, a motive he deprecates.
There’s a lot to be said in response. I’ll start with some background about syntax and morphology and then move to the functions of innovative morphology and some sage observations by Larry Horn.