I am so lucky that I'm retired because my sleep now is completely fractured. I have a dog I adore and he's failing. So my life and schedule revolve around him. I'm not sleeping in my bedroom on the second floor because he can't get upstairs to let me know he needs to go out without having an accident. So I sleep in a recliner. I don't sleep well. He rolls off the couch in the night and I need to help get him reoriented to where he is. Then he usually needs to go out again between 4 and 5. I go back to sleep, but I'm up and down all morning trying to make up for the four hours or so I got the previous night. I know it's not good for me, but it won't be much longer. I know he doesn't have another winter in him. He's already on pain pills 24/7 and I'm finding it increasingly difficult to rationalize keeping him drugged for maybe one good hour a day. I wonder, will I sleep well when he's gone?

I call inconclusive/bullshit on this one:

"A new study conducted by the University of Arizona found that of the 60% of individuals who indulged in regular nighttime snacking, nearly two-thirds said that lack of sleep led them to crave more junk food."

Interesting article.
Sleep deprivation caused the majority of us in my military unit to get "mean". If it affected our decision making abilities I'd say it made us more aggressive, if anything. I believe these effects of lack-o-sleep were well know to the military. And used effectively.