Wait, I realised something, I remember a video of the cool features the 3DS will have.
One of them was if a 3DS came in contact with another 3DS, both 3DS' will share their info.
Another is like the one above, BUT!
If they both have the same game attached, something happends to BOTH of their games, like a battle with street fighter.
If someone has a 3DS flashcard (whenever there is), and the 3DS comes in contact with a 3DS who belongs to a non-hacker, it will share all information... right?
idk, it's just me thinking...