The National Aquarium of Zealand knows that penguins may be cute, but they can also be rather bratty. That's why they've instituted a "naughty penguin of the month" board for their resident troublemakers in order to let the public know a little more about the birds they are admiring.
To be fair, they also chronicle the good behaviors of well-behaved penguins as well. For example, the board might point out that Timmy was naughty because he stole fish and pushed another penguin over, but Betty was good for swimming well and waiting paitently for fish. Deep down though, all penguins, even pesky little Timmy are good penguins.