One would hate to think that the FA have looked at the provocation which resulted in Pardew's outburst and thought... well, he's been punished enough by an incorrect decision.
Much as I might empathise with Pardew's frustration, he simply cannot come out with language of that nature in the potential full glare of the media. Despite his apology, I think the FA have set themselves a precedent which will come back to haunt them, by being lenient.
I think the precedent they would have set if they had charged him would have had a worse affect on the game in this country.