This is a problem at space conferences, too. I’ve been guilty in the past myself, but have tried to improve.

Reducing it by reforming academia:

The liberalization of the American educational establishment has been a colossal failure. Liberals overtook the universities because (reasonably) they saw them as the way to shape a more progressive society in the long term. They insisted that they could set aside their own partisan beliefs and teach in ways that are fair to both sides. It is abundantly clear, however, that a progressive political mindset prevails in the American university system, especially at the elite levels. It’s more difficult for conservative professors to be hired or receive tenure, it’s more difficult for conservative students to speak up without fear of the consequences, and liberal students emerge from the universities with a terrifically superficial understanding of the conservative mindset — and American society is the poorer for it.

When you look at the three values that conservatives (according to Haidt) honor but liberals do not — loyalty, respect for authority, and sanctity — these are precisely the values that are flouted in the precincts of American academe. The result is a more impoverished moral imagination amongst students, a stubborn inability to understand the beliefs and the motives of conservatives, and thus the imputation of nefarious motives to those irrational conservatives who do not see things in the ways the illuminati do. If you don’t believe that this has contributed to the partisanship we’ve observed in recent years — particularly the exceedingly nasty way in which liberals in general have responded to the Tea Party movement, to social conservatives and generally to anyone who refers too much to moral sanctity and loyalty to American traditions and institutions, then I think you’re wearing exactly the kind of blinders Haidt talks about.

Haidt’s work is generating quite a stir.