It's no biggie. A coach caught stealing signals is no different than a lineman caught trying to get away with holding, or a linebacker keeping a cast on his hand after the bone is healed (makes a good weapon). What about Parcells in his Giant days? It's said he left outside doors open at the Meadowlands to create swirling winds and mess up passing and kicking games. Or teams over-watering fields to slow down runners? Or letting fields ice-up to slow down deep-threat passing?
You get caught, you pay the price, life goes on.
