rule freak

Opposite of a criminal; a rather boring and frustrating person who is very lawfully upright, non-rebellious, submissive to authority and so conforming to rules, safety norms and standards to the point that it gets uncool when they themselves or others need to break the rules even for good reasons, they try controlling others with their rules, and may possibly have been a high school nerd, were once felons themselves and got fucked up, or were emotionally unable to be influenced to do the slightest types of deviance (bullying, staying out past curfew, stealing, drinking, partying, fights, pranks, foul language, etc.) during their teenage years either because they were way too wiser than 99.99% of teens, they lived in a very strict environment, they have a naturally righteous or obsessive-compulsive personality, or they haven't really grown past the childlike obediance stage for some reason. Legal prudeness is often considered a form of "experience virginity" if you haven't really enjoyed a phase of being "deviant" or nonconforming at least a single time during your teen years, so others will try to influence you just for the kick of it and get you to taste the hot, sweet flame of rebellion that you missed out on. Anyway, we've all known this one teacher who's a rule freak...

Not to be confused with grammar nazis or police officers.

Amir: Where can I download a crack of Adobe Photoshop CS5?
Ben: I suggest you not to. It's illegal.
Amir: You serious man? Don't be such a rule freak. It's not like they're gonna track me down and handcuff me.