I think Blacksmith sounds better too, but lets face it, people are stupid (I'm not discounting myself...I'm an idiot as well 
). All craftsmen use a noun derivative of their tradeskill's name:
Herbs -> Herbalist
Poisons -> Poisonist
Enchantments -> Enchanter
Tailoring -> Tailor
If you were to suddenly throw in Forging -> Blacksmith people would go crazy because their world turned upside down.
I tried to use Blacksmith once or twice, but every time I got a "You have the Blacksmithing skillset, what's that?" or some similar response. 
In regards to the "Documents" joke, I believe the "Blacksmith" meaning of Forger comes before the "Fake Documents" meaning in most dictionaries. I don't have one handy, but here's the listing on dictionary.com:
v. forged, forg·ing, forg·es
v. tr.
 1.
    1. To form (metal, for example) by heating in a forge and beating or hammering into shape.
    2. To form (metal) by a mechanical or hydraulic press.
 2. To give form or shape to, especially by means of careful effort: forge a treaty; forge a close relationship.
 3. To fashion or reproduce for fraudulent purposes; counterfeit: forge a signature.
v. intr.
 1. To work at a forge or smithy.
 2. To make a forgery or counterfeit.
forgea·bili·ty n.
forgea·ble adj.
forger n.
). All craftsmen use a noun derivative of their tradeskill's name:Herbs -> Herbalist
Poisons -> Poisonist
Enchantments -> Enchanter
Tailoring -> Tailor
If you were to suddenly throw in Forging -> Blacksmith people would go crazy because their world turned upside down.
I tried to use Blacksmith once or twice, but every time I got a "You have the Blacksmithing skillset, what's that?" or some similar response. In regards to the "Documents" joke, I believe the "Blacksmith" meaning of Forger comes before the "Fake Documents" meaning in most dictionaries. I don't have one handy, but here's the listing on dictionary.com:
CODE
v. forged, forg·ing, forg·es
v. tr.
 1.
    1. To form (metal, for example) by heating in a forge and beating or hammering into shape.
    2. To form (metal) by a mechanical or hydraulic press.
 2. To give form or shape to, especially by means of careful effort: forge a treaty; forge a close relationship.
 3. To fashion or reproduce for fraudulent purposes; counterfeit: forge a signature.
v. intr.
 1. To work at a forge or smithy.
 2. To make a forgery or counterfeit.
forgea·bili·ty n.
forgea·ble adj.
forger n.
