I think this hinges on the disconnect between 'normal courtesy' and the deep tradition in baseball that it is *always* up to a team to protect any communication they do on the field - it's always the right of the other team to intercept the other team's communication as long as it is done by 'ordinary' human means, (sign stealing etc) and picking up a dropped data card certainly qualifies as 'ordinary human' means to me. To me, a catcher that doesn't have the presence of mind to realize he's dropped his data card is no different than one that doesn't realize he needs to change signs with a man on second. Tough luck. If I'm Kiermaier, I pick it up.