I don't know that I'd have any lower an opinion of a "gamer" in full dress for their respective game than I would a 501st stormtrooper decked out in armor that required him/her to make a vacuform machine, find a plastics distributor, make negative molds, and then the process of making the suit (Then buying the pieces one could not make such as shoes, the body glove, etc.), and then making accessories for said suit, such as an accurate E11 stormie blaster.
Are they losers? Well, loser is in the eye of the beholder. I guarantee my friend Dan would say "yes", but I personally don't feel so... Then again I like Star Wars.
Gamers just have their niche hobby like we have ours I suppose... Or ST fans have their hobby they love, dress up for, and speak a recognized language for (Klingon). To each their own I guess.
Personally I've only done Star Wars Miniature's Battles gaming myself (Which still is actively played at cons) though that game doesn't have the public support that ones like Magic The Gathering do. Personally the whole CCG thing never appealed to me, but then again neither does poker (Though Blackjack's addictive at the casinos).
As far as RPG's and such though, those can be fun... I find them tedious to be involved in now though, especially with computer games there to fill the RPG void.
Still, with the lacking "realism" of real-time strategy games, or the lack of "scale" in them sometimes, that's why a game like SW Miniatures battles holds a great appeal for me. I was at an event where the one guy came dressed as an Imperial Officer (Controlled the Imperial side) and took it quite seriously. He even ran things with less of his own personal "strategy" and tried to think like the Imperials in the movies (Straight forward attacking, very violent and swift assaults). I mean, whatever floats your boat I guess, but it cost him a couple games as I recall.
Anyway, I really see it as just like Star Wars fans (Some anyway) but in a different hobby. Maybe the gamers laughed at people dressed up for the last STar Wars movie and waiting in a line for 4 or 5 hours? Who knows...