“Be kind. Everyone is fighting a battle you know nothing about.” This quote, well-meaning if more than a bit schmaltzy, is a better fit for the chain e-mails and Facebook posts in which it usually circulates than a baseball discussion. But it’s got some relevance to baseball as well. The major misfortunes — the walk-offs surrendered, the big leads blown, the playoff races choked away — attract broader attention from taunting rivals and other various rubberneckers. But the minor frustrations, the ones that provoke groans but may not single-handedly tilt the result of a game or season, tend not to be noticed by anyone other than the fans of the team that suffers them or inflicts them.