Ummm..........I don't think so...I'm actually a pacifist even in my dreams.
Like, I literally can't kill in my dreams, nor cause harm. If I'm being chased by anything other than a zombie, I literally can't hurt it (zombies I can kill, though). I stabbed a burglar with a knife in a nightmare once and it didn't hurt him. I tried to shoot this mafia gangster with his own loaded gun, only for the gun not to fire. Etc.
I need to rely on 2 methods to get rid of dream enemies. I either have to knock them out (Fortunately, the bionic arm that I can sometimes dream up comes with a built in stun prod), or utterly destroy them in one hit (one time I had a Borderlands magnum that turned people into sand when I hit them). And even those methods can be iffy at times.
So I can't exactly go on a rampage...
...Well...there was ONE time where I had a nightmare that this evil witch was killing off people, then switched bodies with me (yes, that's right. It's as creepy and messed up as it sounds.), and thus got me arrested and almost executed (seriously, I woke up SECONDS before they did it). So...That's the closest I've been to being a villain in my dreams.
Captcha: him with her...OH GOSH. CAPTCHA! WHY YOU BEING CREEPY?!