Stealing Signs

What makes these guys think that their opponents wouldn't figure out what the QB's signal to receivers meant? Musberger's "revelation" is not that earth-shattering, and it doesn't give opposing teams any more information than they already had. It doesn't take a genius to figure out that the quarterback throws to the man-to-man side after he makes his little gesture. If a pitcher is tipping his pitches, he either has to figure it out and change his behavior, or just live with the fact that batters know what's coming. This is no different. If anything Musburger did him a favor by forcing him to be more clever and come up with a better system for signalling his receivers.