SYOP Malware?

Here is a thought: Put some code on your company laptops that fires up in the middle of the night and plays an mp3 or wav file with what ever message you like? You could "program" you employees to be more security aware and hopefully not expose your network, company assets, or personal records to malicious attackers.

A dark side application could be the infection of your competions computers such that subtle but disturbing sounds are played during the night so as to disrupt normal sleep but not awaken the target fully. Thus over a short period of time the target company would grow fatigued from sleep deprivation and thus your team would have the advantage of being better rested.

I wonder if this has been done?