ARE YOU A GRAMMAR NAZI?

You might have heard this expression before and wonder what this is all about.
In a nutshell, a grammar nazi is a person who knows the difference between "there," "their" and "they're." 
More seriously, though, it is a person who uses proper grammar at all times, esp. online: in emails, chat rooms, instant messages and web-board posts; It is  someone who believes it's their duty to attempt to correct any grammar and/or spelling mistakes they spot.

If these definitions don't convince you, let's watch this short clip. 
(You can find the script below) 

The tapescript
Which means a better outcome for everyone, Ladies and Gentlemen that concludes my presentation on the healthy homes and hospitals program or “Haitch” [HEALTHY] “Haitch” [HOMES] “Haitch” [HOSPITALS]. Any questions?
How did you say your acronym again? 
Its “Haitch” [HEALTHY] “Haitch” [HOMES] “Haitch” [HOSPITALS].
Thought so. 
Bloody Hell, you just shot Ian!
It’s pronounced “Aitch”. Not “Haitch”. “Haitch”. 
You can’t shoot him just for that. 
I just did. Anyways, my company I can do what I like. 
But we all signed the: No Bullying In the Workplace Pledge with “pacifically” bans physical violence. 
What did you say? 
I said: “pacifically” bans physical violence. 
Its “specifically”, with an “S”. “Specifically”.
Bloody Hell Tony will you stop shooting people for saying things wrong. 
You! What are you drinking? 
A coffee. 
What type? 
It’s an “expresso”. 
The word is “espresso”. 
Stop it, Tony! 
Oh, come on Luke you know very well I killed my own wife for ironically saying “mispronunciation”. If I apply rigorous standards at home, I see no reason why the same standards shouldn’t apply in the workplace. 
Why do you have to shoot them? Why can’t you just sack them?
Um, uh, I never thought of that. I guess, I suppose I could. It’s just the red mist tends to descend whenever I’m confronted with “ignorami”. 
Actually, Tony, I think you’ll find it’s “Ignoramuses”. 
What? 
It’s from the Latin: we are ignorant. That makes it a verb, not a noun. 
Oh no. What have I done? 
Blimey, at least that will stop him shooting whoever he likes. 
It’s “whomever”.