Yeah, I still think it qualifies as a "Palpably Unfair Act", and if the ref believes it had a significant impact on the outcome of the play, he would have the authority to award whatever he sees fit.
I think a grayer area would be if Ginn wasn't absolutely "running free" -- that is, that maybe there were one or two Ravens who might make the tackle, but just as easily might not. Say, for instance, that Ginn only has the kicker (or in this case, punter) left to beat for the TD, and someone jumps off the sidelines to tackle him? Does the ref believe the punter was really going to make the tackle to save the Super Bowl win?