Teams have to trust players not to blab signals
by Adam Goldstein
Adam's Football Trip
It is hard to know just how much advantage the "taping" gave to the Pats, then again they didn't lose a game until the Super Bowl, that might be a clue.
Still teams have to trust players, not to blab their signals to to other teams, when those players get traded.
When I played football in a small University in Wales: Aberystwyth, we changed the signals every week, then again we only won two games that season, so maybe that was not a good idea!