You use them codes and enjoy 'em.
An unwritten rule that using two is the max? Maybe for you. I dont think the things give you any super advantage seeing as they empty the power plant in seconds, fire at a rate slower than I type and have such poor projectile speed.
Four on a fighter isn't being a gentleman? Surely ,when these things get fired the thing I want to do is let people know I am passed the point of being a gentleman. I am a real gent before the fighting starts, and I actually prefer Rp to PvP but I openly admit to loading up my manta with four of these little chaps.
I am, therefore, a codewhore; but on the list of Disco grievances that is pretty far down the list.
Next time someone complains about the codes, buy him some from one of the ridiculously overpriced dealers and let him try them himself.