I like guns in FDE, but no more than I like black guns. As for the poseur thing, there is a bit of a difference comparing guns to something like clothing and the music/skateboard culture. Unless you live in a place with open carry, you are probably not advertising the fact that your gun is infact not black... and even with open carry I doubt that will be a topic of conversation. But wearing a Pennywise shirt does not mean you care about punk rock, like DC shoes are not a clear indication of you ever having stepped on a skateboard. Those clothing choices people make willingly place them in a particular category, and after a few minutes you can usually tell if they belong there.
Also, in my 10+ years in the military, I have only seen one handgun model that was not black (Colt 1911 MARSOC). All the Sigs, Berettas, Mossbergs, HK45's, MP5's, 240's, M16's, .50's and the majority of M4's have been black. But I will concede that personal bias is a very valid reason to hold FDE against the masses. No sarcasm there, I'm sure we all do that with other issues for various reasons (fully decked out "skaters" who can barely stand on a skateboard, then break their arm causing a medical emergency).