There isn't anything sensitive in the memo. It's a feel good kind of statement. I'm surprised you think it's such a big deal. It's not like the upper management at Apple cares about internet trolling. Such a thing isn't even a blip on their PR radar.
All I know is where I work if it was found out I leaked an internal memo to the media or a blog I'd be fired in a heartbeat. Apple has a real problem with leaks. Cook says they're doubling down on security yet there's very little they did in the last two years that wasn't known about ahead of time. There's nothing sensitive in this memo but it is indicative of a larger problem. Cook & Co. need to do a better job of "doubling down" IMO.