Re: Do as I say, not as I do?
In a way it is justifiable, because the employee is trying to do their jobs through the most efficient way they know how i.e. by using technology. Rather than to lock down the whole system I guess it would be better to train employees and get them updated in fundamental security concerns, not only will that filter out unsafe rogue apps but it will come with the added benefit of keeping employees safe in their personal lives, and a safe employees that is not facing loses from identify theft for instance is a productive employee.
As a startup provider, I wonder whether it would be a good idea to aim at entering the enterprise world through the rogue app approach, I am thinking dropbox here.