[aetherson]

I upvoted, because it's a good thing to be aware of, but I don't think you can call this a "major" security risk. It's not like you're going to see a million people get attacked by a single charger cable out on the internet.

If you're someone who has a lot of really sensitive data on your laptop, sure. But, then, most of those people are probably not all that interested in the MacBook, and at any rate they should already be pretty cautious about physical access to the sensitive machine.