Illustrator :: How To Get Rough / Jagged Lines And Strokes

I asked a question a couple days ago regarding the effects of old style print. Although, I know a lot of it is done manually, I was wondering if it could also be done digitally in either Illustrator or Photoshop.
 
In Illustrator I created 10 brush strokes from a jagged pattern found in a vintage element to represent the scratch board or printing effect. In Photoshop you can kind of create the effect from switching to a Bitmap mode.
 
However, Photoshop is a pain to bend the halftone lines to fit the curves and they are all evenly spaced. Illustrator works better for laying ou the lines based on the tonal value, but using a brush for the strokes becomes a little distorted.
 
How to achieve the jagged edge effect show in this very simple image? The edges and lines are not all the same so I don't want to use the  ripple tool in PS and the wrinkle Tool makes them too ragged.
 
I find it hard to believe this style is only accomplished through scratch board or printing techniques. Even traditional pen and ink doesn't really work like this. I find way too many images, free ones too, like the one below to have it be only done with scratch board.