I do myself. I will save, then start killing everyone that can be killed in a normally peaceful area, such as inside a hold. I do it in Whiterun a lot. Run through the city, killing everyone, and getting to Dragonsreach, going inside, and killing everyone that can be killed in there, and constantly beating the crap out of the Jarl.

Usually the only reason I do the Companion missions is just so I go back after becoming the Harbinger and kill everyone of them. Sometimes you have to just kill people. 

I think killing sprees work better on Fallout games.

In Skyrim, if you kill all of the unique NPCs (example: Hemming Black Briar, and I don't mean quest essential ones) your game actually slows down and becomes more prone to crash on the Xbox 360.

But on the PC I always try to take the Dawnguard by force.

Or the Skaal. Using mods I can kill that freakishly calm Skaal child. And then use super telekinesis spells to throw them all off the cliff.

Or I can squeeze my stressball like my therapist told me to and curb my temptation to slaughter innocent freaks of nature... I'm talking about the Rieklings at Thirsk Mead Hall. Innocent my left firebolt! 

I'm sorry about that... And P.S you shouldn't read small font.

Lol

Don't feel bad about killing Rieklings. I've been in many caves and tombs where they have moved into, and never once found a bathroom. Not even a bucket with some linen rolls next to it. I'm certain they secrete their waste through their pores... Horrible, smelly, little things. 

Indeed.

Rieklings ARE gross, but kinda cute all at the same time. They're alot like boys in their 20's that way. 

I've never been gross.... or cute.... XD

Same.

I went on a massive killing spree across most of Skyrim recently to fill my werewolf perk tree when I got Dawnguard. Falkreath is the only place safe from my wrath, because the game crashes when I go near it xD I started in Markarth, then flattened a load of Forsworn and headed to Rorikstead, then Whiterun, bypassed Falkreath and Riften and ran straight to Winterhold (and almost got eaten by a dragon while trying to kill some mammoths), then Dawnstar, then Solitude, Dragon Bridge, I can't remember if I got back to Markarth or not but then I somehow ended up outside Windhelm again and waited over a whole game day under the bridge in snippets of about three hours to transform back to a Khajiit xD I've done killing sprees before that, one of them got most of Whiterun killed because the whole town aggrod on me and Lydia killed them. All of them. That's probably the reason I didn't reload when she died when I was attacking forts for Ulfric...

Wow!

Werewolf and Vampire killing sprees are very fun. But don't try to go Beast Form in Yngvild or any other high level Nordic dungeon. I took several arrows to the face and died immediately.

Ok.