I sympathize with your reaction. But one can go overboard with this: if the heuristics disqualifying potential sources for a view are too aggressive, then no one will be qualified to present that view, even if it turns out to be right. For instance, the disqualifying description of Summers in the above comment is questionable:
Larry Summers...He's not a famous... expert in...really anything else. He's mostly famous for is this speech,
Take a look at his wikipedia article.
He won the John Bates Clark medal, awarded to the best economists under 40, basically the Fields medal of economics. He is almost universally acclaimed as brilliant within the economics profession, was Clinton's Secretary of the Treasury, a major economic adviser for the Obama administration, and Chief Economist of the World Bank.
He's not a famous geneticist
Is that your real objection? Both James Watson and Francis Crick, who shared the Nobel Prize for their work on the DNA double helix, have expressed pro-eugenics positions, and the view that genetic explanations of ethnic differences in IQ are plausibly to likely significant. I.e. the most famous geneticists ever. Will Shockley, who won a Nobel in Physics for invention of the transistor, also got in a lot of trouble for pro-eugenics positions, and his views on race and IQ. Would you be OK with comments linking to and citing them on their controversial views? Or discussing the reactions to those views?
Summary: Current social psychology research is probably on average compromised by political bias leftward. Conservative researchers are likely discriminated against in at least this field. More importantly papers and research that does not fit a liberal perspective faces greater barriers and burdens.
An article in the online publication inside higher ed on a survey on anti-conservative bias among social psychologists.
The link above is worth following. The problems that arise remind me of the situation with academic and our own ethics in light of this paper.
I can't help but think that self-assessments are probably too generous. For predictive power of how an individual behaves when the behaviour in question is undesirable, I'm more likely to take their estimate of how "colleagues" behave than their estimate of how they personally do.
This shouldn't be surprising to hear since to quote CharlieSheen: "we even have LW posters who have in academia personally experienced discrimination and harassment because of their right wing politics."
While I can see Lammers' point that this as disturbing from a fairness perspective to people grinding their way through academia and should serve as warning for right wing LessWrong readers working through the system, I find the issue of how this our heavy reliance on academia for our map of reality might lead to us inheriting such distortions of the map of reality much more concerning. Overall in light of this if a widely accepted conclusion from social psychology favours a "right wing" perspective it is more likely to be correct than if no such biases against such perspectives existed. Conclusions that favour "left wing" perspective are also somewhat less likely to be true than if no such biases existed. We should update accordingly.
I also think there are reasons to think we may have similar problems on this site.