I think it would be really neat to have a player trademark system for most crafted items. For instance, a player could create his trademark and choose to put it on items he crafts, such as armor or swords.
Maybe to help you visualise this concept, think if everyone in your guild had the guild symbol stamped on the back of their vest. Or, say if Haddo made swords.
A homin spots this high quality shiny sword someone is carrying. He moves a little closer, and sees Haddo's special symbol on the hilt of the sword. Imeediately he knows this sword was made by Haddo. (as for jewelry, Haddo doesnt really need visual markers on his jewels because he's famous enough already.

Also, I don't think this would be very hard for the devs to impliment. It could be just a little something added to the chapter four patch, whenever it decides to get here.
So...what do you guys think?