I'm pretty much in agreement with Elfboy here. It's dumb, sure, but not "IotD" worthy dumb. People make mistakes, and in this case, there happened to be repercussions.
It's akin to forgetting to lock the door to your house. Sure, you probably won't get robbed, but you aren't any stupider than the person who did get robbed in the same circumstance. It's not a defendable action, but it can also only be considered so dumb and the outcome of the event does not make the action any stupider, just more noteworthy. And yeah, sleep deprivation just adds further to the "it was a brain fart" more than actual idiocy.