If people give you attitude like that say something like "Ah an expert,you show me how it's done then" and hand them your guitar or at least make like you're about to hand them your guitar,maybe, as you don't know how big an ersshole they really are.
First off don't try and be cool develop your cool as you go on developing your playing, just ignore 'em and ride far above it, my man.
Try some of these for now..
http://www.guitartricks.com/2000/search.php?input=easy
Accuracy,you say? hmm interesting concept..