Apparently there is a great heaving swell of animosity towards those who don't sleep as much and who brag about it. Examples can be seen here at Diesel Sweeties and Cracked.com. These are both funny to me, but as someone who doesn't rest as well as perhaps most of the rest of you, and also as someone who has spoken about it on many occasions, I may have some additional light to shed on the situation. Because that's who I am, you see - a light-bringer, torch in hand, shining understanding down on everyone like a golden shower of bright truth.
I will not contest that sometimes, a sleep deprived person is in your face, bragging about it. This can be annoying (especially if you yourself have not slept - then you want to kill them five times with habanero bullets) and seemingly pointless. I would point out, however, that all bragging is annoying and seemingly pointless, from the new skirt to the marathon runner, from the saved zealot to the pop rapper - bragging just wears people out. Usually this occurs for one of two reasons - either the bragged at person simply has no shits to give or they're jealous, deep down and truly, wishing they could also get by on less sleep, making them guilty of two deadly sins at once, Grumpy and Sleepy. It's like when people brag about running marathons - it makes me jealous, a little. I wish that I, too could brag about running marathons, but that would be lying since I'm never running a fucking marathon.
Like marathon runners, a sleep-deprived person may also simply be telling you what's happening because they cannot believe it themselves, possibly for many of the same brain-starved reasons. "Hey, I'm only functioning on three hours sleep, giant Spanish banana. Can you believe it?" Yes, yes he can. Have a nap before your reality breaks.
The last explanation for this "bragging" palaver I can relate from experience is simple disclosure, done so that the other members of the sleep-deprived person's shared experiential reality group can brace themselves for strangeness or outright deficits of behavior. I'm not saying that sleep-dep excuses kicking the Alderman, but it can explain it, also the inability to do math, articulate simple sentiments, avoid violence, drinking all the coffee, grumpiness, and protracted blog entries defending one's own mostly indefensible behavior. It also might be practical to share the information; if I think my driving's going to be affected by my lack of sleep, I might share that with you as a passenger. Wouldn't you rather make educated decisions based on real data, freely given?
In closing, you may be annoyed by the sleep-deprived and wish that they would shut the hell up and get some Zs. Remember though, many of them have poor judgment and hot beverages, and you may not escape from your encounters without a coffee bath if you don't tread lightly. Just shine a green light at them and sing softly, and maybe they'll drift off and make the world a better place for everyone.