It's more the effect it would have had on our fans. A lot of the Newcastle fans peddle the pro Pardew spiel, because the media keep telling everyone how well he's doing, and how are failings are due to Europe, or the French players, or Ben Arfa not tracking back i.e. supporting the tool.
If the media are saying he's crap, which he is, and the fans show their disgust more fervently, which they have every right to. He would not last. He'd either run off, or Ashley would have to send him packing.
He'd listen to the fans? Not a chance.