Charlie I think you didn't get what I try to say!
1) I think that the scene where Zoro talk to this guy's was made up, and it actually have in the manga. Zoro asking that guys where is Groove 1.
Well yes that scene was streched in the anime (agrees), from what I recall the scene was from this part in the manga.
http://www.onemanga.com/One_Piece/501/09/
2) And you are right about Zoro using Haki, and problably never will, just Luffy, my personal opinion.
Well I agree with you for the most part with a minor exception. I think Zoro will use haki in the future, due to the fact Luffy has the ability to do so. Also since Luffy is constantly referd to or has a like-ness to Gold Roger in the manga and anime, Zoro being Luffy's 1st mate should have it at some point. Just like Slivers has, compared to the original pirate king.
3) As Akainu said in a previous post, when haki is used it have a little sound effect and the eyes of the people attacked whited out.
Yes that is another point. (agree's again)
What I don't understand is that, aren't we basically saying the same thing?
Just to say again: if a guy like Zoro with 3 swords and a bounty of 120 milions, I problably run away if he looked at me that way!
Agrees 
.
I thought I explain myself really good now.