Peppers and Guion didn't count toward draft pick compensation, but I don't get your argument. Are you suggesting that TT does or should avoid signing a player who can help because the signing might mean the Packers will get a lower compensatory pick for a player they lost? Generally it is a low pick anyway, I doubt that enters into his decision making at all, since the awarding of picks doesn't occur for a year anyway, and a lot can happen that impacts it.
As for the awarding of picks to a rival, a player worthy of draft pick compensation will be signed by someone and the rival will receive compensation anyway. What incentive is there for GB not to sign him?