Hard to think of any case where I have encountered any roguelike elitism. Most people on the forum don't really give off that vibe. In my personal life, others generally look down their nose at me for playing roguelikes. Mostly cause they just don't understand the appeal and usually can't get passed the lack of graphics.
About the closest thing I can think of would be sometimes on the Doomrl forum, some people there sometimes have a twinge of an elitist attitude, but mostly pertaining to that specific rl.
I think Elitism in Roguelike community is pretty rare. Nothing like the people I know who act like music, art, or modern gaming elitists. Those guys get on my nerves. :p