Stealing signs has been going on since you were in diapers. If Mangina was dumb enough not to disguise them, then it's his own fault.
James Washington from the dallas cowboys hayday was just saying on the radio, he knew people were trying to steal signs, and they had codes to hide them. He also said on timeouts, he'd mosy over to the other teams side line to try to hear what they were saying.
All the jealous haters are coming out of the wood work, but this is nothing new.