People in and around the sport of baseball often talk about cheating almost fondly. "Stealing" signs based on naked eye observations is fine. If the Diamondbacks chose to take an advantage through electronic surveillance in a one game winner takes all playoff situation, they need to have the book thrown at them. It wouldn't be charming. It would be disgraceful. 

No one thinks taking steroids to help hit home runs and strike guys out is acceptable, so we know the fun cheating in baseball has its limits.