rules against sign stealing are archaic and nonsensical.
everyone is pushing for an edge, and any coach that isn't pushing the boundaries is a sucka
most folks are focused on the players on the field so much that they don't realize that you can see the signaling during live broadcasts of games. Sometimes they have the signs, sometimes its people doing odd gesturing. Every team has folks trying to decipher signs in-game, and if a person can figure it out in 15 minutes, then they sure af will figure them out after watching 6 hours of game tape.
when coaches are watching game tape they see the signals. should they look closely enough at the signals to figure it out? Better question is, how the hell can any professional coach not pay attention to the signals while watching game tape? It gives you an edge, and it's not illegal. You don't have to send anyone to go film a game to get this data.
coaches are responsible for changing things up, or are there coaches who refuse to change the signs and just keep plodding along? this recent ESPN article even gives title game scenarios where they were sure their signs had been stolen and they had to change them up. There is a quip in the article that did make me wonder about how good Tedford, Dykes, and now Wilcox have been about changing signs mid game.
"If a defense blows up your bubble screen three times in a row, chances are they have your number..." so are we bad at bubble screens or do other teams just have our number? Past 15 years of Cal football makes me think that Cal has two mottos: Fiat Lux and, getting our bubble screens blown up.
ESPN - college coaches on sign stealing