One game I played years ago, had a couple of "special" graphics that were secret, and only were revealed if you did certain things in the game. The program's graphics, however, were stored in a ordinary directory, and you could just go there to view the "special" graphics at your leisure. So, encoding graphics, etc., makes a lot of sense, even if it's only to "reward" a player for doing the song-and-dance to get to it.
Then, too, theft is a reality of human nature. That's why we put locks on our doors and windows, and install security systems in marketplace stores (and some homes). In an ideal world, we would need only a simple toggle switch to start our cars, not a key, and the doors to our homes would not need locks (unless to keep small children from running out into the street, etc). But, we don't live in an ideal world. Such is life.
Then, too, theft is a reality of human nature. That's why we put locks on our doors and windows, and install security systems in marketplace stores (and some homes). In an ideal world, we would need only a simple toggle switch to start our cars, not a key, and the doors to our homes would not need locks (unless to keep small children from running out into the street, etc). But, we don't live in an ideal world. Such is life.