It can lead to feelings of elitism if certain posters get praised above the rest of the forum.
That seems more of a description than a justification. First off, what do you mean by elitism? It clearly doesn't refer to the traditional definition of power being in the hands in the few, the few deserving this power as they have desirable quality traits, because that elitism is perfectly legitimate and in place in the forum with the existence of moderators. So what do you mean by this, then? Why is this an undesirable trait in the forum, and why is it desirable for the forum to be "egalitarian"? What genuinely negative aspects would occur if this elitism was not prevented? Why would a community which does not try to prohibit this elitism be inferior to one which does? Why isn't this contradictory to praising of talent in the Civilization-relevant forums? Or relevant to the OT, contradictory to the existence of the "Ask a..." threads? And finally, what makes you think you can genuinely stop it?